I love my iMac! The big screen, the fastness and the good stereo system, I love them all!
I've had mine for 3 years now, so far it's still doing great. The only thing I really miss is to be able to bring it with me when I travel home for holiday, because I can't scrap then... Though, I'd say, it's been great to be able to take a break from scrapping for awhile, I still miss it though...
I've never had a macbook and, to me, it's too pricey, because I mainly use my computer for scrapping, browsing and facetiming with my family, but, if I do have it, I'm sure I'll love it, too..., especially for the mobility