Nice 11 year old thread.
Never really understood 'am I too old for...' questions re vehicles. Can you afford it? Do you like it? Can you get in and out of it? Can you still drive it safely? Do you have fun with it? If yes, then you are never too old for it! Life is too short to worry about what other people think. As long as you are not hurting anyone else, do what makes you happy.