Depends. I got a "large SUV" but got it from my dad, worked to pay it back ever since. When he bought it was mostly due to the fact that is a real offroader also and since he a tall guy he could feel good inside. I myself am a bit shorter, still looks wierd when you see me getting out of the big SUV.
But I would say with big car comes big responsability, like I understand that I don't need to drive careful because of myself but because of others also, since if a regular or small car hits me, chances are they will be in the hospital a lot while I will only get a few bruises. This also adds to the aspect of "safety", some people buy SUV's for that also, just in case, so they can actually survive.
Parking is harder, but once you get it you will adjust. Also when going back to a regular car you will be amazed on how many viable parking spaces you will find. That being said since in my country we have parking spaces even smaller then EU regulated ones (dunno why) when I go to the mall I always pick a spot near a wall or a pillar. So I could have a bit more room, if I park it in between two cars, chances are I can get out, but my passenger can't or the passenger side car driver can't get in.
Gas prices, well like stated before, since im european it has a diesel engine, a very good one to be fair, even amazed how good the engine and transmission is, I get about 12 l/km max (19.6 MPG) in the city and 7-8 l/km (29.4 MPG) on the freeway or more to say B-road types. Keep in mind the car has about 2.300ish kg with just myself in. So it's a bit heavy.
On the speeding part, depends if I am in a hurry or not. Also if I know the road it helps a lot, since I know where I can min-max the speed and overtake some cars and so on. Also I do have to keep a bit of distance at night as the double xenon headlamps almost x-rays the car in front if I like tailgate. Also don't to tailgate since it means you need to be that more responsive to what happends in front of you. And since most SUV's have a proper engine, overtaking isn't a problem, so you could leave space, then accelerate and overtake, no need to tailgate to min-max the space like you would do with a lesser powerfull car.