RPC because no other coin has tried to keep their volume as low as RPC. I am not sure how it will play out but I am optimistic.

Anoncoin (for now) and Zerocoin once it is released. Both are fairly anonymous but where anoncoin fails is that anonymity isn't built in. Only the ABILITY to be anonymous is built in. I believe Zerocoin will surpass ANC and become one of the greats, given time.

A few other ones might be CAT (though not sure right now), NMC, LTC and BTC ofc, other established alts (PPC, etc), I am not seeing much in the way of other alts surviving because they are mostly pump'n'dump scams. Even EAC seems a little more dangerous to invest in with the premine but I believe it may go somewhere since it already has some traction.

Stay away from coins like NXT. They are nice and all, but do we really want to promote a coin that acts centralized when the whole point of these coins was to be decentralized? I would hope not. Not to mention PoS is kind of a dumb way to make a system. It's new, but is even worse in the wealth disparity than most others. It's instamining on a whole new level.