Although it's very tempting to have as many Amigas as your space permits, as they are superb hardware, I find it a little bit odd. I've seen crazy signatures with 5 A500s, 3 A1200s and so on. The key to success is to have the Amigas you're really need and use of course. If you have so many Amigas, then you'll never have enough time to play with them, just turn them on and off and nothing more.

So, what I did, although I have 5 Amigas at home and nothing else? Easy, each Amiga for its purpose:

A600HD when I'm at the hotel in the summer period, small and portable.
A1200 which I use it mainly for WhdLoading, adventures, protracker, devpac and other things almost daily.
CD32 in the bedroom when I want to play some games.
CDTV in the living room, especially tuned and modified to sit down on the couch and watch some oldskool demos.
My AmigaOne X1000 which is my main computer of work.

Simple eh?