The Gameboy Advance! Thinking back, I didn't actually have that many games for it, but what I did have I played the hell out of. Pokemon Sapphire, Pokemon Leaf Green, Final Fantasy VI, Kirby's Nightmare in Dreamland and Mario Kart Super Circuit were easily my most played games. With rentals I typically prioritized console games but I did have a ton of fun renting stuff like The Legend of Zelda: Minish Cap and Final Fantasy Tactics Advance.
I remember going to my dad's one weekend in 2002 and he just had a white GBA with Baseball Advance, Monster Jam: Maximum Destruction and a couple other games I can't quite remember along with a carrying case. Split custody was good for some things sometimes I guess lol. Once the second generation of SPs came out I remember begging my grandma to get me one and thankfully Toys R' Us had a light blue one on sale for $50, so she was willing to get me an early birthday gift.
Not the most nostalgia for the GBA, but man oh man the SP was the first handheld where I remember really loving the design and feel of it. Ironically I played my Gameboy Color probably just as much as my GBA and I recall always playing GB/GBC games on my GBC despite the GBA being backwards compatible up until I got the SP. I think I just liked the vertical handheld style of the GBC more and I do remember the GBA's screen buggin me a lot which the SP fixed.
