Each course and vehicle has it's own best character so I don't have one favorite. In the car and on most courses I preper Pipsy's excellent handling. In the hovercraft I like Banjo, Krunch, Drumstick and TT. The last can be a little difficult to control. The airplane can acommodate almost anyone and I chose depending upon the situation. Overall I really like Banjo as I have liked heavy weights ever since Mario Kart.
Mario Kart 64
My old favorite from the first Mario Kart follows into this sequal. It's Bowser all the way for me. He has the fastest top speed and can just knock everyone else out of his way.
Original Mario Kart
Same reasons as above but the knocking people out of the way is even more useful in the original version. When you're driving with Bowser it's as if there's no one else on the course.
Fighting Games
Well my very first fighting game that really interested me was Primal Rage on later reflection it's not the greatest but it's the one that piqued my interest.
Primal Rage
I'm a Talon fan all the way. What could be more fun than getting to fight as a raptor? Well a lot of things actually. Like KI for instance. . .
Killer Instinct for SNES
I gravitated towards Sabrewulf and Riptor from the first time I tried this game. I really like both of them equally but I usually play much better with Sabrewulf mostly because he's easy to control. I play well with the others but Riptor's speed and agressive feel contribute to his staying power.
Killer Instinct Gold
Sabrewulf is it in this go around. They killed off Riptor(dang). Sabrewulf is much improved however. The Sabre pounce and stomp make him my fave.
If I had to pick a second it would probably be Tusk or Combo.
What can one gather from all of this? I like to pound my opponents to death whether in a race or a fight.