Very boring. In the sense that he's a huge guy who keeps plodding forward slowly and most of his opponents go backward slowly, just keeping out of range, then coming inside, landing a few punches (usually overhand or straight power punchse), then getting out of the way, and outside of some half landing jabs, 3 of those actions is all you get every round.
I've never found him very exciting. He wins fights, but just not in a very crowd pleasing style. Valuev-Briggs would actually be an interesting fight...
But soon, one of them would (accidentally?) take a forward step, and neither man has enough energy to back up and maintain range. Sooner or later, you'd see rock 'em sock 'em robots.
I didn't say Briggs-Valuev would be exciting or crowd pleasing, I said it would be interesting. Certainly not exciting though.
If you're 7'2'' 325 lbs. and u can box even a little you're gonna win alot of fights. That's just the way it is.