/me can't stand trill!!
MSN because its easy to use, quick, and because of M$s dominating ways alot of people have it, it also looks the nicest imho, has the features most people need
AIM, nuff said lol
ICQ, has the best features, but isn't as appealing, also alot of poeple i know who are MSN already don't use it
YIM, used to be my fave but the messenger has gotten really f*cked up and hardly ever works properly
