I played nearly all of them, being a car lover. Porsche 2000 (the first I played) was very cool for its age (I played it in 2007-8 on a crappy laptop).
I then played (and played, and played, and…) Underground 2, as I didn’t like the lack of open world of the first one. And to me it’s the best in the series. I probably wore down the arrows in an old keyboard by playing it, and I spent an awful lot of time with the dyno and test track. Damn, I miss that… With the 16:9 mod and with better textures it was even better!
Most Wanted 2005 was the next one I played, and while I liked the police and variety of cars, I was very disappointed by the tuning. Good game, though.
I temporarily skipped Carbon because I played Undercover on my DS first, then again on PC. I hated the piss-filter, but it wasn’t a bad game. Also, it has the best soundtrack of any NFS.
Next was ProStreet. I liked it quite much, because the tuning part was great and it had a good soundtrack, but unfortunately I never finished it because I lost the saves after an emergency backup+clean install. I didn’t like the not-illegal vibe, though.
Carbon was… meh, because of the car class system, and a constant light stuttering that irked me an awful lot (it still does that in my 5600x+Vega64 current system)… also I didn’t like the “clan war”.
Shift and Shift 2 were too much sims and too little arcadey for my taste.
A surprisingly good NFS was Hot Pursuit 2010, except for the lack of tuning and for some extreme rubberbanding, but I had fun with the chases on both sides.
And now, the disappointments (except for one that was an half of it)
The Run was pure crap IMHO, as it was Most Wanted 2012. You couldn’t buy/unlock cars with experience/cash. I finished The Run because it was short, but I was tired of MW2012 after… half an hour maybe?
Rivals…. 30fps lock means no play. I have a damn PC, not a conslowle!
The 2016 entry was great, except for the MFing online-only part and for the *****s that rammed you out of a race. Good tuning, good handiung, good graphics.
Heat was the epitome of meh, but its worst was the (again) MFing loot system. I finished it thanks to cheats, but it was bad.
Rivals though, was the one with the sh!tt!est soundtrack ever, and that made me hate it (I hate playing without the soundtrack). Also, it had an horrible handling and bad graphics , at least on PC and compared to Forza Horizon 4.
I have ZERO hopes for the next NFS, BTW. With every Forza Horizon being better than the already extremely good previous ones, with a great return of Dirt (loved 2,3 and 5, hated 4) and Grid (same thing, 1, 2 and 4 were very good, the Aurosport bad) the future of NFS is bleaker and bleaker. Except if they do an offline-only, good-looking, good-handling NFS Underground 3 with a good mechanical tuning system like the 2, with modern and older cars and with a killer soundtrack…