Understanding my own predictableness

[Mr. Curious]

I've been playing with a lot of the same people for a while now and I feel like they can read me like a book. Given that I only play live NL (and a small bit of live limit), what is the best way to figure out how I am predictable? If I played online, I would be able to easily look at hand histories and chart my betting patterns, but in live play, I don't have that luxury.

Is it worth it to just blow some money online and see if I can find the patterns there?