I have played P basses pretty much exclusively for the last couple of years, and haven't thought I'd want to try anything else. I mean, I have a 4001 which I love the look of, but whenever it's rehearsal or gig time I reach for the P. To the extent that I think I may be looking for a good home for that one, but that's another story.
Anyway, yesterday I reluctantly sold my Fender Bassman head, and the guy who bought it brought his Jazz to try it out. I've never had much of a thing for Jazzes, but I really liked the sounds coming from his. Plus the fingerboard inlays and binding looked very cool indeed. So now I have Jazz GAS.
I will be trawling through threads on P vs J basses, trying out loads to work out which one I want, then obsessively watching them on here and the 'bay until the GAS either goes away or is sated.