Fighting of the spirit, it’s a bit long though.
Just got a new Blackberry yesterday, so that’s still default. I plan on using the one from my old phone - The opening theme from Batman: The Animated Series.
I used to have Lucca’s theme, then I switched to my Okami-themed phone. “The Sun Rises” as my ringtone and “Small Success” for text messages.
I revel in my absolute refusal to get a cell phone! Cower before me, you silly people with your ball-and-chains! I gloat over my freedom! Bwahahah!
Well, there are certain differences between our societies - it helps communication severely when the average Finnish person can grunt more than a few words due to the fact that there’s enough distance between the parties of the conversation for once, to put one stereotype on overdrive. 
My studies at the moment concentrate on near-spontaneous A/V duties, so having a phone with me pretty much ensures I actually get information on potential filming gigs early enough. E-mail? SLOOOOOW.
(Also, I sort of cheat. I handle most of my cellphone duties via IRC and instant messaging on my PC. Why spend money on text messaging? >_>)
The only reason I allowed my mom to force a cellphone on me was because I could use it as a cheapo mp3 player. To this day I loathe people being able to contact me all the time.
Old NESs Mario Bros Overworld. I also have a screenshot of the first stage for my cells wallpaper.
The Good
The Bad
And the Ugly
Every time my phone rings, a Mexican standoff takes place. It’s frikkin’ awesome.
When things happen really fast, this comes in handy. Say, for an emergency meeting or a tactical over-throw.
Please note: My ringtone is now the “Boss Battle Theme” from Final Fantasy 7.
I think I will silently steal that one and take credit for it amongst my own friends. PS sorry I never got back to you about hanging out. My work schedule is, at the very least, sometimes exhausting.
I use the 600 AD theme from chrono trigger.