I dont know how good he can hand read but he made some big online cashes the past few years and i suppose he can hand read well.Thats the reason i 3bet ATo preflop, since i thought im ahead of his CO range most of the times and also i wanted to disguise my hand so i can play a big pot in position if i hit since we were both relatively deep.I had an ace blocker as well so less combos of hands he is gonna 4bet me with.
One more thing, we meet before at some bar since we have a mutual friend and played some online multiplayer games few years back but he probably doesnt remember me as i look like a recreational "Im here to have fun playing cards"guy.