The only alt-coin with any value distinct from bitcoin is Namecoin. You can actually do something with it that is unique - buy .bit domains.
The others are junk, and while they may have some slight utility in buying some very limited numbers of things, that's just for the moment. I see no future at all for any of them, once the alt-whales have sucked out the value from all of the unwary holders.
Well, PPCoin is at least theoretically interesting, given that long-term it should (again, theoretically) offer far lower energy consumption than bitcoin for the same security level, and therefore, significantly cheaper transaction fees when we get to the point where fees matter more than block rewards.
But generally, I agree. The alts are pretty much all silly, with the possible exception of PPCoin and NameCoin. Litecoin gets a boost right now as people shift GPUs to it, but I expect it to be mostly temporary. The fact the quicker confs are hyped as an important feature is laughable. There are essentially zero situations where an avg 2min conf time is acceptable but a 10min isn't. Both fail at buying brick-and-mortar coffee. Both succeed at buying coffee-beans online. No difference.
Seems there's a certain amount of money, as a somewhat fixed percentage of bitcoin market cap, that people are willing to speculate with on all the alts collectively. So when there's a new JunkCoin every day, there's a dilution effect.