Hey, thanks for the warm welcome guys! To try and take the points some of you have made, yeah The SMS is by a long long way my biggest collection (Around 260 individual games plus variations as well as most major console packages, almost all available accessories, magazines from back in the day etc. and my pride and joy - the rarest game in existance for the system - Smurfs 2 / Les Shtroumpf Autour Du Monde - of which less than 30 copies are known to exist worldwide), I'm a member of the Forums at sega8bit.com and smspower.org although the sega8bit ones are by far better so I contribute there a lot more regularly. There are so many underrated games for the system and you guys have mentioned quite a few of them.
As for the NES, I probably have around 80 games, so it's quite a small collection but then it's never been my main focus so I don't increase it as regularly as I could - still am always interested though and am a member over at NESworld.
I'm relatively new to PCE collecting, although that said I did a lot of research before I started collecting for it because with my SMS collection having grown to the size it has there isn't really that much for me to get for it any more, so I wanted to fnid something else to really get my teeth into! I really had a choice between focussing on the NES more or choosing something different and I went with the PCE after taking my time to get to know the system. I love the design aspect of so many of the games, and the split of Hu Card and CD games is great! I especially like the Duo console, a really unique and great piece of hardware.
Anyway, thanks again for the welcome!