Funny I read this now because I've been trying that out all day today. Mainly b/c I noticed that my opponents were doing those kinds of things a lot, and then a too aggro style is suicide. An added benefit, and this is just theory, is that people will also be less inclined to bluff you out, as a sign of weakness could be a ploy. If you're always aggro, a sign of weakness is more often than not real.