Coins I like:
LTC (because it has a great developer network and community)
PPC (innovative technology... sunny is a great developer)
XPM (because of implications towards scientific research)
NXT (super beta coin right now but IMHO has HUGE potential so I invested a small amount (.35 btc) into it. Never invest more than you can afford to loose)
DTC (I like the idea of being able to store data on the block chain)
NMC (domain name idea is cool too)