to be honest i think your thought process is already very good, there isnt too much to add. try posting a few hands as examples and see what responses you get. in the AJ hand for instance, i would need to see the pot size (i cbf working it out) to see if we had the odds to improve.

as a general rule i think it is worth the extra 2BB for metagame considerations, you dont want to be attacked for being weak/tight throughout your session.