I say blizz away. diablo three is not horribly unpleasant to play. What you’ll have to get used to is an overabundance of extreme detail and architecture.

My old tired eyes tolerate the dark, muted screens fairly well, at least so far.  We’ll be doing safari in this for a while, so get used to it. Your controls will be more or less the same, and the layout follows the original more or less, so there isn’t much to learn. One thing that might drive you nuts is how to identify a UNID. Merely right-click on the item in your backpack and it’ll miraculously become whatever it is already.

http://youtu.be/6-yp2e90QFI