Aggressive BnZ is the only way to do BnZ. Timid BnZ never bleeds the enemy's E out as they just rebuild it during the long egress and ingress. Timid BnZ relies on catching somebody doing something else.
I would say I am an aggressive BnZ'er, but rarely do I find them when the tables are turned.
My normal profile (in my nooish P-47M) is to come in high, 18K normally, to scare off all the Pee-51's, and Run-90's (they hit the deck when anything co-alt/E arrives). Then I work my way down trying to keep my M in the performance wheel house till all the red guys are gone. Rinse-repeat...
I have been trying to branch out though. I have kills in 18 different fighters this month so far, only 4 or so that have made this list...