I've yet to drive ANY LT1 equipped car, let alone a Fleetwood, but I do have to say that I am in love with my '93.
First time out driving it today after being away for two months and it seems even more powerful and smoother on the road than before, the ride being enhanced most significantly with the fresh Kumho whitewalls. THIS CAR HAS BALLS, simply put. No modifications, just the standard 350 TBI V8 and a fresh oil change, and the thing not only cruises as smoothly and silently as a new Lexus (seriously!), but has enough juice that with even medium throttle, it'll put you back in your seat.
The odd duck out or not, being the first model year and with the "old" engine, I love the thing and am still SERIOUSLY considering buying another '93 next spring/summer for college use.
Plus, as some may have already mentioned, the older TBI engine seems even cheaper and easier to maintain than the LT1, plus has a similarly large plethora of aftermarket goodies, since it represents the "classic" 350.
So, overall, I say '93 just based on my experiences, but agree that either a '95 or '96 is technically the "best" there ever was.