The problem is becoming regular, or being liked. When I was newer to the forums I generally posted in the same way I do now but less good, I did the occasional good post mixed between piles of pointless crap. When I was newer however the mods generally saw the pointless crap and just banned it. However even keeping to such things I find myself getting less banned every year. It is likely the result of "oh its him again doesn't matter" or "oh hey him, may as well leave" etc. and they generally don't seem to bother to ban, knowing that the resulting posts I would make wouldn't be worth paying attention to fearing I would be posting goatse or something. Also the problem comes that I know several mods now, and as a result they tend to not ban due to it, unless Bahamut who generally throws a ban if any of my posts contain the word pony.
Sure I still get banned now, but in many cases I can be trying hard to get banned without breaking a huge rule and never gain a mods attention, personally its a double edged sword. One side its nice to be able to post, the other side it makes it seem like no mods love me. Spread the love mods!