Both Jazz Jackrabbit games (never played the GBA game), the GBC Zeldas, Kirby 64, Banjo-Kazooie/Tooie...Those are the super-old ones. The slightly older ones would be both Golden Sun games, FFTA, Skies of Arcadia, Ratchet and Clank...I have quite a few PS2 RPGs.
I haven't beaten most of them yet, though.
How "retro" something is depends on a person's point of view, and how old they are when they first picked up that game.I played with an Atari 2600 and Commodore 64/Vic 20 back in the day, but it wasn't until the N64 and GBC came out that I got into more serious gaming, so I didn't experience that "golden era" of the Turbografix, Neo Geo, SNES or Genesis. My best memories came from the PC and the more recent consoles (the PS2, Gamecube and similar).