Nitro RC cars are a lot of fun. I used to have a Tamiya TG10 and for about 12 months it kept me entertained every weekend. I gave it up in the end because it was starting to cost me too much to run. It seemed every time I took it out for a run something would break on it, and it was usually something that was expensive to replace.
But anyway, I've been thinking about getting another one lately, probably an off-road buggy this time though.