i liked sms although i myself owned a NES. all my friends had sms (called gemboy in korea; imported by samsung) and had seemingly cooler games, especially because where i lived (Korea), NES never became dominant, even in teh late 80s when hyundai (yes, the car company) officially imported NES's as 'cumboy' (sounds dirty, doesnt it?). most kids who had an 8-bit nintendo-compatable console had really cool looking pirated hk nintendo-clones with 100-in-1 games built-in. but those die fast (most last less than a year!)
it was always genesis (called supa gemboy/supa aladin boy; also imported by samsung) that got most attention. my dad actually went on a trip to the US and purchased the north american edition of nintendo, which, naturally, was incompatable with everything available. -_-
my favorite would have to be msx. those were so cool. everyone had them. i mean, EVERYONE, excluding me. they were made? imported? by daewoo (yes, once again, the car company) and most elementary schools in the 80s owned them for computer class. it was really cool because while you were supposed to be doing excercises on BASIC (it had built-in BASIC), you could simply pop a cart and start playing games. and everyone had the same mario clone for it. ####, got sidetracked again. but anyway, msx's were really cool and they were my favorite in the 80s.