I'm fairly interested in Litecoin. The market's not currently huge for it, it's safe (for now) against the big heavy ASICs that are dominating the Bitcoin arena, and the return is okay. If Bitcoin starts getting hard stupid with the difficulty, I might try to ease back into mining for Litecoins instead of Bitcoins.
It's a good idea.
BTC is too heavy for daily use, while LTC is a good alternative.
But even altcoin like LTC doing very good in the market, I am still looking for some altcoins that can provide an inspiring & revolutionary system, which I have failed, sounds to me the BTC is the final station to currency revolution.
I'd rather take it as a transfering system than a type of daily used currency.