I have always run commercial Unix at work, since 1984 (version 7 then BSD 4.x then System V).
At home, I first run Minix on a 8086 PC and later an Atari ST in the late eighties. That was fun. A really tiny community compared to the current state of home unix-like users.
I switched from Minix to Linux in the mid nineties when Linux started to be somewhat stable while commercial Unixes were too expensive for individuals.
I have mostly switched from Linux to Solaris then OpenSolaris based distributions, but of course I keep an eye on other O/Ses.
I wouldn't use Minix as a lightweight platform to run X apps remotely. It is currently back again more an experimental O/S interesting for kernel internals study. It is reviving from near death experience now its licensing model is "more free": Minix 3 source code is no more subject to any charge and is freely downloadable from http://www.minix3.org/source.html