When I hear the term "pushy bottom" I think of somebody who tries to get your cock up his ass after you've turned him down. If you mean the same thing as "bossy bottom," a guy who says do this do that while you are in him - yes that is annoying. If a guy can't fuck worth a damn once he is in though I will give him guidance - though this is more with inexperienced guys I find. These guys often are so excited to just be in a big beautiful bouncy ass that they almost cum immediately and don't get many strokes in.
Being a big, masculine, aggressive looking guy I tend to attract a different type than most bottoms. One of my exes once told me after we'd been together for a while, that the first time we met he wanted my ass so bad but was afraid that I was a top and would try to rape his virgin hole. His favourite postion was reverse cowboy, me riding him while he watched my big round buns and thighs bouncing.
I agree with Male22192's comment that these types of tops are more into pleasing the bottom than taking their own pleasure. Though at the same time I get a great deal of satisfaction from hearing their moans of intense pleasure as my soft velvety wet hole smothers and strokes the glans of thier excited dripping cock head and shaft, suctioning up their pre-cum. I love their shock and excitement when I pop my hole off and turn around to swallow their cock into my throat coating it with more of my spit so it will slide easily back into my warm pink cunt. Often the men I meet are a bit insecure about their own masculinity, and seeing the dawning realization in their faces that the guy they are inside who may appear to be all macho is really just a gaping, open pussy for their use is so exciting.