experience over everything. Luck is not a relevant factor for a poker player, volume is. Professionalism is optional, if you can make more money being obnoxious, then do that instead.
Tony G. got Ralph Perry to "put all his money in with King Jack" by berating and harassing him. Tony is a great player and utilizes his talking abilities frequently.
The most important thing is experience and volume, with that comes that understanding of concepts like levels of thinking, game theory, and metagame. When you get good and move up the game starts to get really really complicated.