Ah, the nostalgia.
In Smash 64, the two characters that I played as the most were Fox and Kirby. They could never die, I tell you. Never. I'd have to say that out of the two that I had picked Kirby for the sake of loving a particular series; the only reason why I ever played as Fox was because I liked his play-style.
In SSBM, I have had a convoluted history of mains and secondaries. I jumped from hither to thither, picking just about every character on roster. My best friend in Ohio picked up the game, and we had tons and tons of friendlies. While there, I mained Bowser and Yoshi for a long, long time (Yoshi being the better of the two; my poor Bowser still can't compare today, even though I can perform most of the advanced techs). Obviously for the sake of rekindling the love in Smash 64, I then tried going back to Kirby and Fox as well, but that fell flat as SSBM changed each character fundamentally (for the longest time, I couldn't stand Fox being a fast-faller, and I also hated Kirby's bloody dash attack and 'hammer; the former character I can tolerate and actually like playing with now that I've grasped the game, but the latter character I still can't stand). I actually played Marth for a while, too (that was a disaster, I found out later, as my friends in Florida schooled my happy ***).
Then, I found Sheik as a main. 'Nuff said about that one. In the past, I played as her before and scored many wins. I don't know why I drifted away from Sheik to begin with (since she fits my playing style very nicely), but I'm happy to have rediscovered her courtesy of my peeps in Florida (wave "hi," Asper, or however ya spell yer Latin name on here).
The hunt for secondaries began, and I soon found myself deliberating between numerous characters. I discovered Peach quickly; something about floating in the air in the middle of a jump and pounding the hell outta people with F-airs and other attacks clicked with me. Then came the Ice Climbers. Before, I never even touched the Ice Climbers because I thought they sucked horribly. Now, I love them almost as much as I love Sheik (it is regrettable that they got the yank for Brawl, but oh well). Finally, there was Young Link. I picked Young Link because he had the one thing that Adult Link didn't have: A little bit of speed.
And that's where I'm at today.