I'll start:

People that think pocket aces is a guaranteed win and can't lay it down no matter how much the board and betting action tell them they're beat.

thats true in the smallest of games and the weakest of players.

in all levels most players play too loose especially out of position.

players vary their game by how they are doing presently. that may be the biggest leak. steaming is part of that. and takes many forms you need to spot as a winning player, live or net.

Players that don't have a medium-strength showdown value range.

This player type constantly overextends themself and is terrified of getting outdrawn. They have two ranges: the give up range, and everything else gets the gas pedal.

They never win at showdown with marginal hands because those hands either bet so aggressively that they fold out the opponent, or get to showdown against a narrow range that has them crushed. They have no real trapping range; their passive lines are almost always dominated.

It's a very inefficient way to organize your equity. This style really only works well against calling stations. It's easy to exploit. And it's a common leak among weak aggressive players.

^ guilty as charged. Although I just began learning and am quite timid. I apply my thinking of what I would have played to what my opponent would have played...and many opponents at 5c/10c poker are willing to play absolute garbage cards.

Any specific examples would be good, but I'm thinking middle pairs are one of the most common hands you're thinking about.

One thing I wondered a while ago when I read something like this is wouldn't it be preferable to force your opponent into a fold in order to win the pot?

to effectively bluff late in a hand you need to be able to read what he has and then know how much to bet that will make him fold.