Most all the above...👍
I must add to that I greatly enjoy video games, was into "battlefield", MOH, COD, etc., because of the adrenaline. My cousin kept trying to get me to try the GT series (I love, I mean LOVE, to drive fast, don't even get me started about the mountains in West Virginia with my Dad's VW GTi) -- I always balked at "racing" because I thought driving games were cheezy and not really "like driving."
One night at his house after a couple beers he (somehow) convinced me to pre-order GT5, an the rest is history. What I love (as I said, in addition to all the above) is that, in most video games/sims, etc, there is always a "down" time, a time when you can catch your breath. If you've ever played a first person shooter you know what I'm talking about, you can always hide behind a bush or a wall... In GT5, there ain't no down time: you must always be at the "edge," and if you aren't, you'll get beaten by someone who is. The ultimate adrenaline rush. If you aren't unceasingly, relentlessly at the edge you aren't driving fast enough!
Oh, and also: The Nurburgring; The frickin' impossible Formula GT challenge in the Extreme series, A-spec; the sublime dawn at La Sarte during the 24H du Mans; the community, from the time-shearing tunes of Shirakawa and Adrenaline, to the acerbic wisdom of Daan and Famine, to the monk-like rigorousness of all those who contribute to the UCD thread; the look on my Maserati-owning Uncle's face when I put him in a Yellow Hat GTR on Suzuka with my DFGT; the gloss on my Ford GT in the afternoon at the Redbull museum in Photo-Mode; going from the joy and pride of winning amateur series races in a souped up, racing soft-tired 1100 bhp Veyron with all the assists on to the despair and frustration of coming in .04 sec. AGAIN, in the challenges with a stock car/stock tires, with PP set to the median and no aids whatsoever; ahhh, what am I doing writing -- I could be playing right now!