I hate everything that stops me from just buying a disc with a complete game, install and play it.
I dont want to first create an account, install plattform software(which is most of the time error prone), see that the activation server is down so I have to wait. After hours or days rinse repeat, finally be able to install, getting multiple GB of patches which takes forever since million other sheeps try the same thing, i finally get to the launcher which bombards me with advertisments of Day-One DLC or tries to talk me into adding my facebook credentials. And after hopping through all these loops I am finally on my always-online Singleplayer game I payed at least 60 Euro for and can enjoy it... WRONG almost certainly the gameservers will have to much traffic, be buggy or laggy as hell which either makes it a pain to play with constant disconnects, or not being able to play at all because I cant even log in.
So pretty much the whole list, hardly buyed any games recently and replay old classics.