I've been to see my GP, but she had no idea if any of the longer-term methods would affect my PCOS. Googling around, it sounds like there might be some issues with the implant - one forum said in New Zealand they wouldn't even prescribe it to people with PCOS, but (a) I'm not in New Zealand and (b) not sure how reliable that is anyway - but there's also some people warning away from the coil because without hormones my womb-lining might just keep building and building (again, not sure how reliable that is). And with the injection if I have issues I can't do anything until it wears off.
I've never really had issues with hirsuitness, but I did get some acne (and still do, even on the pill). Weight gain does concern me a little, but my main concern is loss of libido - the last thing I want to do is get on some serious contraception just to lose interest in sex. I've switched pills several times to try and deal with that, and frankly I've been dithering about coming off them for a while anyway, to see how my body deals with it.
So, basically, any personal experiences out there? I was leaning towards the implant until I stumbled across so many horror stories.