I loved g/s/c. my favorite games ever. sadly though I lost my gold cartridge when I moved (I only had gold). and I'm not even sure I still had my gb color.
then I heard of the two remakes, like the fr/lg ones and I was really excited
after playing hg, there are some things I miss about the old games. like, the music. I liked the old music better. but luckily there's that thing you can get after the e4 that gives the original music or something. I haven't gotten it yet so I don't know much about it, but I'm looking forward to getting it.
I like most of the things added to the new ones though, like the pokeathlon, altered routes that give the air of playing a new but familiar game, the touch screen menu, the infinite sized bag, etc. plus I like that they don't have the pokemon from the 3 and 4 generations even though the games are technically in the 4th generation. thank god, because the games would be ruined if so. go gen 1+2 pokes! (2 are better though ;))
since I was pretty young the last time I played gold (and didn't fully understand everything I was doing) I'd have to say I like hg better. can totally get the nostalgia part about g/s/c though