I don't mind a lot of posts (over 4 per day, which many people seem to consider a standard), especially if they are all quality but I can't stand people that re-steem 20+ things a day I usually un-follow such people to try and clear up my feed, which is unfortunate because many times I like the users content and would up-vote them more often but only a few people like that and your feed will become totally useless; In my opinion.

Also I don't care for some users when their banners / links at the bottom is more substantial than the actual post lol, not that big of a deal though...