Do You Use Custom Ringtones?

With news that the EU is cracking down on sketchy cell phone companies that hawk cell phone wallpapers and ringtones, I realized I hadn't bought or used a custom (or any nonstandard) ringtone in years. I guess I feel like I've outgrown them, but on the other hand, I'm getting a little sick of the few preprogrammed options I have in my phone (and don't even get me started on how our whole office has the same standard BlackBerry ringtone. We've begun making up lyrics).

But now I'm out of the ringtone game. Do I buy one? Spend time making one? Do I pick a song I know, or just a cool sound?

What about you — do you use a custom ringtone, or do you just go with whatever comes programmed on your phone?