I voted PPC because it's the only one listed that does something new and useful. Everything else on the poll is a blatant copy with no original ideas besides tweaking variables that don't matter (like block time) or switching to a botnet-friendly hash algo for the sake of obsolete mining hardware.
Don't waste your money on "boo hoo I missed the boat" pump-and-dump schemes.
PPCoin excites me a lot. I honestly think the only reason it hasn't risen even further in price is because people are still trying to wrap their heads around the original ideas. It has a lot of unique advantages over Bitcoin and Litecoin, I am compiling an easy understand list of them and am putting them on a simple website... stay tuned.
PPCoin, though there's still plenty of opportunity to overshadow it.
Feathercoin is a joke.
When the next scrypt based coin that actually adds some sick features to it comes out, that'll be huge. Feathercoin is just a distraction until then.
I used to say the same about Terracoin. Yet it's got to 50-60 cents being an almost complete Bitcoin clone. In fact it almost committed suicide and still it's going strong.
That's when I realised, it's people that give coins their value... Feathercoin is here to stay imo. Especially with so many Litecoin miners backing it.