I love piano, but I sort of hate it. I took it for several years, and while my piano teacher told me I was really gifted and was super mad when I quit, I just couldn't deal with how much discipline it required. You had to play so much and focus so much on technique... it just wasn't *fun*. I picked up guitar instead and never looked back. I've written several piano pieces despite this, because I do love the instrument, just not so much the methods required for one to truly become great at it. It's the same for any instrument, really, but with other instruments you can often get a satisfying sound even at a lesser skill level.