It varies from person to person how communicating over the internet effects them. Some might be more inhibited, while others will be less. I think that how you act, in many ways, all the time makes up who you are. Now I know there I times that you feel that you acted entirely as if that things that you did wasn't you at all. That's normal in some respect. Ultimately, I feel though that different parts of ourselves show through at different times.
"I am what I need to be..."
"Nemo me impune lacessit - No one provokes me with impunity."
Maybe each type, considering we act and feel (or not feel) differently toward people in the real world, is predictable in a sense of how seriously they take the internet. For example, someone who likes people in real life will obviously be more "considerate" online, which isn't to say that they're any more aware of the people on the internet being actual people (I know reality is sibjectiv,e not getting into that here), they just care more and so will act differently.
VI VERI VENIVERSUM VIVUS VIVCI
"By the power of truth, I, while living, have conquered the universe."