My first DS was the DS Lite. I bought it when the game “Contact” came out. Played various JRPGs on it, as I’m wont to do with handhelds. IIRC, the DS Lite was backwards compatible with GBA carts, which was great. I loved the look, feel, and size of it. Honestly, DS Lite is probably my favorite Nintendo handheld, with the Switch a close second.
After that, I think the next DS that I had was the 3DS. Which I still have; I even booted it up earlier this year to try to play “Phoenix Wright: Ace Attorney – Spirit of Justice.” I didn’t end up playing it on the 3DS, since I have that anthology on Steam, but I wanted to see where I was.
Games or series that I played a lot on the DS line were practically all of the mainline Ace Attorney games, and even some of the spin offs like the Professor Layton crossover and AA:Investigations. Fire Emblem was another. I think I played Awakening, Fates, and Echoes. I played at least one Pokemon game, too.
I had a Sega GameGear as a kid. Yeah it was a Sega system, which Sega was major back then, but the GameGear was nothing compared to the Gameboy. Very cool system, in that it had a full color screen and was backlit.
Now that was at the expense of being heavy as all hell and a monster eater of AA batteries. 6 of them at at time!
I think that was basically the only non-major system I had.