I got hooked on them a few years back, Tony. Have a Tiger I in the basement, along with a five drawer dresser full of upgrade parts for it, mostly Tamiya. Great fun, but a very long project in waiting I fear. While working on it I discovered there was also a huge interest in the 1/6 and 1/4 scale stuff, which looks quite impressive when on the move. Typically all metal fabrication.
Still not as much fun as the original 1:1 stuff, however.
Enjoy!
David