I like steam, I'd rather use GOG for the drm free but for me it comes down to price, plus you buy a couple games on steam its going to be running anyway. With origin i find to be a huge pain in the ass to have running, EADM (the client before) used to allow you to install and you could turn it off.

In my opinion I love downloadable games I much rather have that than a box anymore. (CDs in the drive is annoying)