I prefer something with some sort of style. I don't care if they're realistic, but I want something that doesn't look like I'm just walking down the street.
For instance, Call of Duty and Gears of War are both realistic (neither are cartoony) but while Call of Duty simply emulates reality, Gears of War plays with proportions and the world around it to make a style. While I don't think Gears of War's style is the most amazing ever, I appreciate it more than something like Call of Duty.
I can see the real world anytime I want, I want to see something else.
Beyond that, I don't care if it's more cartoony as you put it, or realistic stylized.