This site isn't working for me, but here is what I've thought of the NFS Series:
ProStreet: Uhh...no thanks, didn't even bother playing it past the demo
Carbon: Fun, no real badass cop chases though. I did beat it and the Canyon races were a blast (Especially online!)
Most Wanted: Probably the best of the "new" NFS games. Driving down the highway in an Aston Martin with 12+ cops on your ass was super fun
NFSUG2/UG: Never played them, too much emphasis on rice.
HP2 was OK. It wasn't great by any means and having to drive tracks for MILES (There were some tracks that were like 10 miles per lap weren't there?) was annoying. Plus the cops were pretty stupid and easy to outrun, but it wasn't bad.
PU was great, I have probably beaten that game 2 or 3 times because I just love it's dynamics. There's really no way to get every single car though
High Stakes felt like a bad rehash of Hot Pursuit, IMO, and all of the cars looked like they had 4-wheel-drive and sat higher than a Ford F-150.
Then there's Hot Pursuit, oh how I loved thee. The only one I make race tracks for and really got into. I knew the ins and outs of this game. It was also the reason I bought a 3dfx card (No joke)
NFS2SE: Arcade insanity. I still play it on my DOS-box
NFS:SE: I know about 80% of you haven't even played 3 or 2, but the first one was also a blast.