I really enjoy the racing genre. Since November, I've gotten NFSU2 and Burnout 3. Both are a LOT of fun, but are unique in their own ways.
NFSU is probably one of the most well known games I've ever seen. Everyone I talk to has the original, and even those who aren't gamers know its name. The original was a hit, and 2 has an incredible anticipation. Is it worth the hype? Peronsally, I'll say it was. The customization is even better, a new physics engine adds a new and better feel to racing, and racing modes are all fun. This game is a lot of fun... if you take out the exploration. Exploring was probably one of the worst ideas they could have put in this game. It was cool at first, but it quickly got long, tedious, and boring. I actually liked the previous title's linear setup rather than a long, drawn out open-ended type. Aside from that, my only other gripe is the Outrun system. It seems highly unpolished, but its a promising start.
The other game is Burnout 3. Honestly, what's more fun than destroying the competition, and actually being rewarded for it? I was really impressed by this game. The racing is flawless, graphics are excellent, and the controls are so easy to pick up, even an 8 year old could learn how to play this within minutes. I really enjoyed Crash mode, too. There's nothing more addictive than making the biggest mess of rubber and steel possible. I couldn't pull myself from this game. My only aggravations were that I often you thought that you could crash too easily sometimes, and some of the racing didn't belong (1-on-1, time trial, etc.) Also, there's no customizing whatsoever. Just a set of three lame paints (usually red, black, blue, and/or white) Otherwise, it's just excellent.
Which do I think is best? Well, I can't really say. NFSU2 has better overall presentation, but Burnout 3 is more addictive. I can't choose...