There are some tough fights where a dude is just "throwing jabs", but in reality hes practically just touching the other guy's guard. And some judges and people would give the guy that round just because of that fact.
I also put a lot of stock into the guy who is setting the tempo, he might not be throwing a lot of punches but he's fighting at his pace, id give it to him more or less.
Clean punches, effective agression, and ring generalship is mine. However when it is a very close fight with alot of close give and take and I can't give someone the edge going in to the championship rounds I will generally give the nod to the fighter who can kick it in to a higher gear for the championship rounds. If that right could be down a round or two but able to close the show strong can have a good bit of weight in my eyes. Example would be Estrada vs Gonzalez 2
He made a very good point abou the Jacobs match. Jacobs was getting completely dominated for the first 7 or 8 rounds. The judges gave Jacobs many rounds down the stretch as Jacobs started to do slightly better, but many of the rounds Jacobs won were very even, toss-up rounds. The point being, the match was scored far closer by the judges than it actually was. If you split the closer rounds towards the end that could have gone either way, Jacobs could have easily lost 10 rounds to 2 or 9 rounds to 3. Instead Jacobs somehow was given 5 rounds by two judges and 4 rounds by the other judge. That wasn't accurate scoring. The overall contest was comfortably won by Canelo, it was never a round away from a draw on two judges cards. That's horrible scoring, that's scoring any remotely close round to Jacobs the same kind of stuff you accuse judges scoring for Canelo in some other matches. In some of those late rounds, Jacobs would land an occasional clean punch but Jacobs was still very cautious and selective with his punches, Canelo was letting his hands go more and controlling and winning more of the exchanges.