Oooh....Sonic the Hedgehog for the Genesis was my very first videogame. And I even got to play it on the original console, what a treat. X3
Anyhoo, I love the 2D ones, form the original to Sonic CD. They have sentimental value to me because they were my favorite series as a kid, and basically the only series that I loyally followed. I really liked some of the 3D ones, but at a certain point I gave up on the series, now I'm a loyal Zelda fan. (Yes, I am looking forward to Spirit Tracks, mind you. XD)
Anyways, I would play the Genesis at my friend's house. He lived across the street from me and I would go over there almost every day to play Sonic 2 with him. I was always Tails and kind of the decoy when it came to the bosses because Tails has infinate lives. We had all these complicated strategies for the bosses, special zones, and just plain finishing the level, at ages 4-5, no less! Fun stuff, and this was basically the pattern that my friend and I followed with every 2D game.
One day, my dad brought home Sega Dreamcast. How I loved that thing, it came with a special blue transparent memory card, one remote control, and two Sonic games: Sonic Shuffle and Sonic Adventure. We later bought Sonic Adventure 2. I love all three of them, and I highly reccomend them to all Sonic fans. I'm not talking about the re-makes for the Gamecube, oh no. Play them on the Dreamcast, it's a totally different experience, espically in the Chao Gardens. Anyhoo, those were the best games I've ever played. Later, my youngest sister got a GAmecube for her birthday, and seeing that my discs for the Dreamcast were all scratched and busted (I never took good care of them when I was young.) my dad bought us the Gamecube versions of those games. Sadly, I am yet yo find a transfered version of Sonic Shuffle, I loved that game despite how hard it was. It was always better than Mario Party in my opinion. (then again, I've only played 4 on so I never got the N64 experience. =P)
Holy....ok, I'll stop. That was much more than I expected to type out. I'll be back to this topic later to continue my thoughts. XD