Terran- they are very easy to learn and buildings/units are not very expensive but you still have to work for them. The tech tree is not hard to figure out and the units are very generic for easy use. Protoss is also a good for players who don't like Terran and can maintain an economy. Protoss buildings are expensive as well as units, and most are gas heavy. I wouldn't recommend Zerg (ever) for a very early player unless you expect to play Zerg for the rest of your Starcraft II career. Zerg are hard to figure out since their gameplay is so much different than the other races since you lose workers for buildings. Well, there's my two cents on the matter.