The Viidians are a friendly race, with extremely advanced medical skills and they preserve life whenever possible. Viidians are favored by many races because of their peaceful and caring nature. However they also have a strong military arm, with enormous cruisers as the backbone of their defenses. Their ships are capable of making crippling blows to the enemies defenses.

perhaps this is better?

The Breen

The Breen are a strong military race. Their weapon technology are very advanced and they don’t show much mercy to their foes. The Breen utilize biological components in much of their technology, including their ships. The Breen warships are also equipped with cloaking devices which is a dangerous combination with their already deadly weapons. Breen brains are four-lobed which makes them unreadable for mind readers, they also have no blood. The Breen are known for their low integrity and backstabbing nature. The Breen are highly territorial and they destroy any ship that enters their space.

What do you think?

The Bajorans

Bajorans are a peaceful humanoid race, with ships that are capable of warp flight. They live on a fertile M class planet in a system called Bajor. They have a strong connection with their nature and surroundings and are specialized in art, philosophy, technology and architecture. Bajorans are led by a spiritual leader called the Kai, and by a provisional government. They are also known for their strength and endurance, during occupations and difficult times. Bajorans also are capable diplomats and can maintain relations with other races with relative ease.

The Akaali

The Akaali have a pre-industrial society based on a M-class planet. It is obvious that it would take a few more centuries before this race is capable of warp-flight. They are frightened for alien species and first contact should be carefully made. The Akaali are a friendly race, and are somewhat more developed in farming and medical treatments. Overall the Akaali don’t have much to offer to us, perhaps with assistance from us, they could grow into a part of our empire.

they all look good to me.

-----------------------------

The Chalnoth

The Chalnoth are an very violent race. They are large carnivorous beings, and have even been known to consume their enemies. The Chalnoth people live mainly in anarchy, although they will form small groups with a leader if it helps them. They are a spacefaring race, although nothing is known of their vessels. In diplomacy, step lightly with them, as they will kill any who threaten them.

Perhaps something about their technology? Or what kind of ships they use (if they use them ofcourse). If they have indeed poor technology, you could say something that they are a pre warp race or something...

i just received word that all races should perhaps get a different race discriptions per major race. Like the Klingons would look differently towards a specific race then the Federation would. This always can be done after we have finished the race discriptions of the race, just to let you know that we have enough work to do.

I changed a few things of the description.

The Chalnoth

The Chalnoth are an very violent race. They are large carnivorous beings, and have even been known to consume their enemies. The Chalnoth people live mainly in anarchy, although they will form small groups around a leader if it helps them. They are a spacefaring race, buying small vessels from other species. Their technology is behind that of other races. In diplomacy, step lightly with them, as they will kill any who threaten them.

The Cheronians

The Cheronians are a race of humanoids with bodies that are one side black and one side white. Racial conflict divides the race between those with black on the right side and those with white on the right side, with the cultural belief that what color the right side of you makes you superior or inferior. The Cheronians have a long history of aggression. They have life spans of tens of thousands of years and can biologically create large amounts of energy. Their technology and spacecraft are superior to most races.

The Corvallens

The Corvallens are a humanoid race, having red skin with a cracked appearance. They have an average amount of strength and their technology is equal to that of most races. They are a neutral race of mercenaries and traders. They usually run their trade between powers. They are considered untrustworthy by many because of the actions of their mercenaries.

This description isn't too good, but unluckily there isn't much information at all about this race.

The Evora

The Evora are a humanoid race of smaller stature. They live off a vegetarian diet. The Evora are very new to spacetravel and operate primitive warp ships. Although their ships are primitive, their technology is up to par with most civilizations. They are led by a regent, and are known to be very peaceful and diplomatic with other races.

Another short one, but what do you expect, they're called a minor race for a reason.

The Swarm

The Swarm are a highly aggressive race and have very territorial behavior. They do not hesitate to attack any ships that enter their space. Instead of using small amount of large ships like many species, the Swarm use thousands of very small ships to attack their enemies. Their ships are able to attach to another ship and drain it's energy. The Swarm's technology is advanced. Diplomacy is very difficult to undertake, as they are violent and their language is very difficult to translate.

Vulcans

Vulcans are a humanoid race, with copper-based blood, slightly green-tinted complexion and notably pointed ears. Vulcans have developed a culture dedicated to the complete mastery of logic, learning to suppress their once-violent emotions in nearly every aspect of their existence. Vulcans may seem arrogant, but they are very loyal to their allies and friends. They are also a race of exploration, and have strong ships mainly used for defending the borders of their empire. The Romulans are an offshoot of the Vulcan species.

What do you think about these, made by SonOfMogh:

El-Aurian

The El-Aurians are a race of listeners, and also have some limited empathic abilities. This race also seems to feel changes in the time continuum.They have a lifespan of several centuries and therefor have many experiences and knowledge. Most El-Aurians are willing to help out other species to help them with their problems. El-Aurians are excellent diplomats but are also qualified in trade and technology. El-Aurian ships aren't build for combat, but are capable of defending themselves against intruders.

Perhaps this one needs some more thought