I basically queue one of three ways.

If the weekend BG is good, I queue for that.
Good for me, means a large player pool.
As I do a lot better is the bigger BG's than the smaller.
I sometimes queue for the BG weekend, even when it is one that sucks to box, as it seems to be the best honor per hour, when a team is gearing up.

Second choice is the Random.
That is more honor than any specific BG, if it isn't a BG Weekend.
The larger BG's where we have a better chance to win are ideal.
The smaller BG's which are much less boxing friendly, generally losing these quickly is the best honor (I never play to lose).

My third choice is to queue for a specific BG, usually Alterac Valley.
That is consistently the most fun for me.
I'll often queue for this, at least half the time, over the Weekend BG or Random BG.
Just because you have to enjoy the game, not just go for the best honor per hour.