For me it's my Encore Strat. £30 in Cash Converters and worth every penny.

Closely followed by my BC Rich Warlock. £50 off Fran a couple of years back. I recently peeled off all the stickers, cleaned it up and got it set up properly. Since then it's become my main gigging guitar.

I like how in both of these pictures I'm not really playing anything. I do know chords, I promise.