Give it a year or so
after you get the PhD - I felt exactly the same way at the end of my masters but after a break from academia I find myself actually quite fancying a return. Not that you should quit the music either, of course!
(Kendal, Tue 5 Oct 2010, 19:17, 3 replies)

^This^
Once you're Dr. Supreme Crow, take a year out and push your gee-tar duties to the max.

Indulge yourself. Have fun. THEN see how it all looks in 2012...
(Billy The Fish wants to gargle with Lucy Pinder's bath water, Tue 5 Oct 2010, 19:29, closed)

Agreed.
I did ten years of research and for the last three had the same average mood as you (hated it; wanted out). Took a year out. Then another. Realised that I missed it and was fortunate enough to get back in again after such an extended hiatus. Can't imagine ever doing anything else now.
( ThisCaledonianClown has left it far too late, Tue 5 Oct 2010, 20:41, closed)

yeah, I hated my PhD project too
I went off and did a postdoc in a different field, realised I sucked at that and now I'm doing a postdoc back in the same (but slightly different) field and I'm enjoying it again.

Take some time out, maybe try to do some teaching or something, then decide whether you still hate it.
(xanthine, Wed 6 Oct 2010, 11:05, closed)