I typically like to rotate between a PBJ (Jelly), PBJ (Jam), PBH and if I'm all out of bread, then just PB. It keeps things interesting. I've been doing this for about 10 years now. Trust me. It never gets old.
BTW, did you know that 96% of people put the PB on first when making a PBJ? Interesting, eh. I, for one, am one of the 4%.
Don't believe me? Check it out for yourself:
http://www.peanutbutter.com/funfacts.asp