im a wrestler who just started doing no gi bjj (about 3 weeks) and i can say that it is REALLY difficult to tone it down when you're rolling. i don't have an ego (because i suck), but im constantly being more aggressive than most of the pure bjj people in there, just out of habit.
im about 5'10, 170, and among the smallest in my bjj class. but wrestling's really helped me to get and keep good position while rolling with much bigger guys. of course, i suck at subs, so it doesn't really mean anything and i always eventually get my ass kicked.