dunno if I'd play a sigged guitar on stage.
like Mark said, it'd feel kinda like dress-up.
and unless it was signed by the Rocky Horror cast, that just wouldn't work.
the SRV one is a prime example of dress-up.
that Hinson one though, that's not so over-the-top, and I'd have no issues using that onstage.
so, I guess it depends on the guitar.
I'd also avoid anything associated closely with Randy Rhoads, like that ringed LP and such.
those are HIS, not mine...know what I mean?
and 10 guitars/basses here.
1x6str acoustic, 1x12str.
1x5str bass, 1x8str bass.
Bullet Strat (reclaimed from gal's kid who doesn't use it)
SG, LP, 2x BC Rich (all humbuckers in these), and an Ibanez (s/s/h)
the SG gets the most use.