My iPod freezes multiple times per week. (Most recently, five minutes ago, as I tried to rest after a night of paperwork.)
I use it strictly to play music.
Some day, Apple will learn to make one of these portable music thingamajigs that doesn't crash. They just need some more time to iron out the kinks. They've only had seven years so far.
The attached image is a Google search showing how common this problem is. The second hit is from 2004, The third hit is an Apple doc on the topic, linked to a movie they made on the topic.