Do you have a favorite fantasty race you prefer to play? Why?
Is their a particular fantasy race you hate? Why?
Are the gnome-lovers going to dominate this thread? Why?
Favorite: Human; for the extra Level 1 At-Will attack power, the extra feat and the extra trained skill at Level 1, among others. When I want to play a wizard, human is the default choice because the resulting versatility is one of the main reasons for me to play a wizard.
Least Favorite: Drow, because they seem to be all about the angst: they're either evil (with a capital "Eve") or else Drizzzzzzzzzt. Their racial backstory is overdramatic enough to overwhelm minor nuances that don't have a huge amount of work and roleplay piled onto them.
(That's if people actually play up the racial backstory in-game. In the Robot Chicken videos, Bluebell the Drow was played in a way that would have led me to forget there was even a Drow at the table if I hadn't kept on reminding myself of the fact.)
Also dislike: Dragonborn and Tieflings' being included in PHB1: those should have been saved for PHB2, at least -- and maybe for PHB3.
Also dislike: Shardminds. They are a stretch. I can see a reason for them: it's a part of including animated machines, vegetables, and minerals as PC races (warforged, wilden, shardminds) for the players who have tried all the other possible combinations, and who are highly interested in trying all of the possible combinations of different mechanics and racial backstories.
Re: Gnomes: No thread-domination so far.
I have never played one; never even contructed one for fun. I haven't seen the point, yet. (It'll probably come to me in the next few years if I play around with it long enough.)