I don't think I even want to touch 200cc haha. As for Mario Kart itself, it's one of my favorites series. The only two games I don't own are Super Mario Kart and Mario Kart Wii, however I have played both so I'm not at a loss at least. Mario Kart 64 was my first N64 game and the game that made me want an N64 in the first place. Rainbow Road blew my mind, so the fact they remade it for MK8 is super nostalgic and special for me. :') I also really like Super Circuit, even though it's balls hard, lol. And I just got Double Dash!! last fall so I played that a LOT for about a month or so. Pretty fun, but I'd say it's pretty hard too...Super Circuit still has it beat though. There's so much you can unlock in that one and it's crazy difficult for me, even to this day.
If I had to pick a least favorite, I'd probably say MK7. I didn't get to play it much and I don't think I played much because I didn't find the tracks interesting or even memorable. Every time I see the MK7 tracks remade in MK8, I think, "This was in that game?" Exactly my thoughts last night when I played in Neo Bowser City, actually. lol