I have tried to have favorite songs as ringtones before, but when it got to the point where I started sitting bolt-upright when the song came on (not my phone ringing), I knew I had to change them!

I tend to have themes with my phone. At one point I had a load of Final Fantasy music as ringtones, and the victory fanfare as my alarm. After that I had a "retro games" set, of course including the classic Super Mario Bros theme! Now they are various Bleach openings.

Strangely, I can personalise my backgrounds, ringtones and alarm tones, but I have to use default message tones. The Samsung D600 is a bit of an odd phone in that way, but I like it.