I have three and bit guitars- the bit because it is an old nylon-stung classical that belongs mostly to my mother (and unfortunately i haven't been able to 'borrow' it permantly) That was the first guitar i ever played, so it holds a certain sense of nostalgia for me. The second is an acoustic Fender that i saw in a second-hand shop for £60 and stared at pathetically until my mother bought it for me as a combined birthday and christmas present, for which i am eternally grateful! It's old, won't stay in tune for more than a day, and has several bizzare burn-marks, blisters in the varnish and scratches. Those injuries were there when i got it, and i put some stickers on it to cheer it up a bit!
The third, and the one i use the most, is an electric Westfield (no, i hadn't heard of it either...)again bought second-hand, this time by my grandmother, god bless her, at a furniture auction for around £70. It's easier on my tiny fingers and sounds ok even when i play it badly! I swear electric folk shall inherit the earth...
I can't choose a favourite from them, they all mean different things to me and they all sound different. I love them all! :)