Absolutely! The fun and the nostalgia factor is what makes it, plus the "tinkering around" factor that you get with real physical classic hardware!
I've just spent a while installing Workbench 3.1 on my "new" (to me!) A3000 [thanks Castellen!] and faffing with softkickers to get KS3.1 running from RAM. Why? Just for the hell of it! Installing from floppies is great!
As the other posters have said, I also use PCs for my actual real work, getting things done, etc, but will still return to the Amiga for "classic" stuff.
- Ali