ToCA 3 had the best career style, in my opinion. Haven't play F1 2010.
Toca 3 has some story going on, which works fine however for FM I think it should be more reality based, they can keep the rivalry aspect (M.Rossi anyone?) but have a game structure closer to what real drivers are doing - entering races, fulfilling sponsor expectations and getting results to they can enter even bigger races. Instead of "hey you did awesome last race so this team is giving you a top drive for nothing" fast track way of progression.
I would like to see limitation in equipment, being forced to race with inferior machinery, and actual consequence to under performing etc.
I think there's something to be had from this idea. In Forza and GT, you're kind of this omnipresent force (in terms of the kinds of races you enter), so it's more (realistically) like you're some sort of broad-reaching racing outfit, rather than a single racer with one hell of a mission.
Clearly, a lot of people would relish a motorsports management game, but that shouldn't detract from the main mechanic of prior games. So we're probably talking about (yet) another game mode; just another way of playing, where money is more scarce, you need drivers, licences, cars, spares etc. and you have to play out a season, ideally accelerated. I imagine this is what GT's B-Spec is heading for, to some extent - love it or hate it; or ambivalent towards it, sure.
As for the driver "story mode" from the ToCA games, I agree that it was a bit arbitrary, but how liberating was it to know that you weren't
expected to win on your first time out? That's not to say it was easy. A mode like that in Forza / GT where you still get rewarded for doing well
relative to expectations would be superb. Just think how much closer races could be, and the replay factor (for a given series) would (could, if done properly) be great.
Just a note: technically,
this is ToCA 3. I presumed you were both referring to ToCA / DTM / Pro / V8 Supercars
Race Driver 3, though. I never played ToCA WTC.