re: Poker & Varying Open Raise Sizes
I do not vary my preflop raises based on position but most I've seen advocate it generally reverse your thinking (ie. less in EP more in LP). I will vary my preflop raises based on the stack sizes of my likely callers combined with my hand strength. For example, if I'm on the button with 44 and the BB is a bad loose player with 40bb stack, I'll open for 3x instead of 4x to give myself the implied odds
I want to set mine. If I had a big pair or AQ+ in the same scenario I might make it 5x.