I think you're absolutely right actually. Looking at the hands I'm calling off in the blinds, often they're just like a suited ace with a small pair or other relatively unconnected side cards. I think this would be a smaller mistake in multiway pots, but even playing somewhat nutty hands out of position isnt all that profitable. This might be a significant leak for me actually.

As for 3-betting, my range consists largely of strong AAxx and premium broadway and rundowns like JT98ss+. I would refrain from 3-betting bad, or even mediocre AAxx out of position. For example depending on the table dynamic I may not 3-bet AcAd9s7s from the big blind.

It's fairly obvious that I need to be expanding my 3-betting range, especially in position. If I am to succeed at higher levels I can't just be 3-betting premium hands. There certainly needs to be a 'speculative' portion to my 3-bet range, and even a smallish 'outright bluff' portion.

Anyway, I'll try and adapt from here. Thanks for the input.