I play only racing games, and prefer sims. But what i've found over the years is I like to have some variety in the type of game.
They are always
very intense for me, especially if playing with AI...and much more if you're playing against other people online. (try racing in a professional manner, in a fast car, in a 1.5 hour race with 25 other humans online...and control your patience/emotions and car well. Very intense)
They can be very immersive if you've got a triple screen setup, wheel...pedal...shifter controllers, and you're driving a standard car with the h-shifter. Some people like the TrackIR for head-tracking...others don't. Some are saying the 3D games are helping them drive more accurately. But I think those are both unecessary.
Don't bother if you are not going to get a wheel controller and basic pedals.
For variety, I like to play a few games. Because sometimes I just want to drive...not compete.
ARCADE:
I like TDU2 because there's 1000 miles of roads...no real cops going after me...I can turn off the online mode...and drive casually, or like a maniac. It's the huge high-quality graphic environment that makes it nice. However it has an amazing number of functions for great online play with others. And although it is 80% a race game...it is similar to The SIMS in personalization. You can even choose to go to a casino and gamble with others using virtual cash.
The downside, the racing physics suck. However, if you love a game...you will overcome that by practicing a lot.
It's like all arcade and arcade/sim games i've played...if you want to drive all cars and roads...you have to go through their game challenges first to unlock them.
Then...you can just pick an area of this large environment and just drive anywhere you want. Otherwise, initially there's a lot of interuptions from the game "story" and challenges.
It distorts on triple monitor displays but is easily set up for it. I choose to use it with one monitor though. The distortion isn't huge, but it bugs me.
It does not function well enough in cockpit view for me to play it. However I usually play games like this with the hood or bumper view. This may be a glitch unique to some systems...not all.
http://youtu.be/v0Oj9IlP-dc
ARCADE/SIM:
I also love rally racing. Racing in the dirt, the snow, the rain, etc. Dirt3 is a great game for that. Great eye-candy, but for me...still not great physics, but good physics. Again, you can overcome the wonky steering easily with 50-100 hours of practice.
This is not a game that just goes on forever though. Like most race games you are put in a series of 3 minutes challenges, and do them over and over.
Here's a Dirt2 video to give you an idea. Very similar to Dirt3:
http://youtu.be/lEw72ji4DPU
F1 2012 looks good but I don't have it. And like most of these types of games...you spend a lot of time in menus. However in this game you can do full racing scenarios...practice, qualifying...and the full race. The race itself would probably take you 2 hours, but that's with AI. I bet most online games will be run at 50% real race length as most people don't have the time.
SIM:
I spent years playing
rFactor, and rFactor2 is out soon and looks like it might be the best "looking" sim game out of the ones i've tried. It is also nice as the community has created many cars and tracks for it. Nothing compares for variety of cars and tracks.
But i've chosen
iRacing as the game to focus on because of their online licensing system. If you drive bad...you do not progress. It is for people who are serious about racing like real drivers. There's tons of rules, and it is very expensive. iRacing looks like a game that will be around a long time, with a real focus on accuracy of physics and tracks. I'm gambling all my time and money on it to last, and they say this is their intention. Most games get sequels. This one will just get updated and expanded regulary.
Live for Speed has got good sim physics as well, it just hasn't changed much in the past few years. The development isn't there, but it is cheap to get...and so is rFactor.
Driving an F1 car in a sim is very intense, and seldom boring...and can go on for hours. These 2 all have great multiplayers options, they just play-down the eye-candy to reduce lag while online.
So racing games have a huge "rush" to them...often without a lot of screwing around with menus, but you have to like cars and driving fast...and you have to have the patience to learn the roads, each curve on each track, and different cars and their handling characteristics.
So they have a lot of depth. But the most accurate sims usually don't have the extreme eye-candy. You have to use an arcade or arcade/sim game for that. And the only one I know of that you can sit down and go at for hours without interuption...is TDU, or TDU2.
I'd say TDU2 has what you are looking for more than the others.
Watch some online videos to get an idea.
Go experience computer racing at a friends, or an arcade before you invest $300+ in
controllers.
If you've got lots of money and want to feel immersed...get a high-end computer with
triple monitors. (or one large monitor...or a projection system)
If you haven't got lots of money, at least try to get the largest 16:9/16:10 ratio monitor you can so you can enjoy it better.
Regarding audio...that's one of the coolest things about racing games, is the great car audio. LFS is the only game I mentioned that doesn't have really good audio.