There are a surprising number of die-hard Underground fans, and they'd love to see more low-end cars. And a lot of them do want trucks. Not to mention it's usually difficult to detect sarcasm in text.
I liked underground, but i chose only to drive the 'top end' cars in circuit/drag races, only true drift cars in the drift events because the trashy physics (particularly in nfsu2) made RWD cars HARDER to gain points in drifting.
E.g. in circuit type races i use RX7s, GTRs, Evos etc. Even though again many low cars were better, particularly in nfsu2 again the AE86 was the fastest circuit car fully tuned (what the ****?).
However, i liked underground, i loved High Stakes, Hot Pursuit etc. Personally, i'd like to see the exotics V cops in beautiful places come back, i'd like to have a couple of tuners in the same place to, maybe create a kind of rivalry between tuners and exotics?
I'd also like to be able to drift, but not in drift mode, but just be able to drift in the main game, in circuit races, whatever. I want to drive however i like at any time, you can't beat a good old fashioned tire smoking, lights flashing, engine thrashing cop chase around twisty mountain roads. So personally i want a mix of high tuners, classic muscles and exotics
For all these reasons for a start i think the race cars should be removed right away, CCGT etc. Unless there is a road version it should be there in my opinion.
As for cars i want to see:
Alfa Romeo 8C Competizione (spelling?)
Audi RS4
Lambo' LP640 Roadster
McLaren F1 GTR (you know, the big orange monster, its road legal so it's here)
Mercedes CLS55 AMG
Mitsubishi Evo X (top model not sure what the current highest is)
Nissan 240SX S13 (see below)
Nissan Silvia S15 (tunable to some extent primarily for drifting rather then racing)
I see GTR V-Spec but i want to clarify, the new Nissan GTR and the Skyline R34.
Rolls Royce Phantom (purely for challenge purpose when it comes to chases)
Shelby Cobra