I've been in the middle of playing the second one lately, trying to 100% for the first time. I've beaten the game and gotten every badge before but then got bored before I finished everything in the game.
The original has always had a special place in my soul. Many years ago I used to play it all the time, and when I beat it, I almost immediately started over on another save file. I must of played through it 15 times, which is a lot considering how long the game is.