I have several...just depends on who's calling:
My Sis - Brady Bunch theme song cause she was dating a guy with 4 kids and she has 2
When someone calls from home - We Are Family by Sister Sledge
Friend - Grillz (she's a Dental Hygienist) by Nelly
Another friend - Cowboy by Kid Rock
Basic ringtone if caller not in my phonebook - Rockstar by Nickelback
I have a few ringback tones also. My favorite is Monday, Monday by Mamas and The Papas...it's my ringback for Mondays only
I get both from Verizon (pay) or Phonezoo (free)