I focus mostly on investing in Litecoin, while mining some of the other random coins every once in a while to try something different. Litecoin was the first true alternative to Bitcoin because of the framework it was built on, and just about everything since then has been a copycat.

As a disclaimer though, I do own a 'few' Litecoins as of right now, though a farfetch from the few thousand I used to hold mid-2012.