It's not that we have too many alt coins. It is that we have too many useless alt coins.
We have almost 500 released coins now, it is crazy. But there have been some good ones. Like POS coins were mentioned, I really like Hobonickels, the upcoming wallet is awesome. But I'm really sick of all the copy-pasta coins that took someone a weekend to make. I don't know why people buy into Sexcoin and Potcoin and Lottocoin and all the 100's of stupid coins, but I never understood why Doge coin blew up either.
You can't stop people from making dumb coins but I sure wish they would collapse sooner that later. It has gotten to the point where you can't even follow coin development anymore because of all crap, unless you want to spend 4 hours a day going through the muck to find the diamond.
potcoin is for pot which about 50 % of population uses, sexcoin is for sex as internet is for porn (look it up), lottocoin is for the people who buy lotto tickets gambling which is a sin and contributing usually nothing to society while living off welfair and handouts.
I think lottocoin fails to deliver. the other two seems hanging around very well.