Since I started recording and mixing (just a few years ago) I find myself disecting every tune I listen to. Where do they pan drums. guitar tone, volume, effects, etc.. Especially listen to stuff from the 60's and 70's and 80's. There was some crazy panning going on and its sound so nice. Today mixers have homoginized the art form of mixing. Its kind of straight forward. Pan guitars left and right, drums middle, bass middle, etc.. And I do that too. I still consider myself a newbie and have alot to learn also. I have decided Im going to start using automation and non-generic panning to bring my mixing up a notch. Many home/new recordists just do a quick standard generic pan and set levels, then slap a limiter on the mix and dont get into automation much. Automation is were you bring your mix to the next level. It will make it breath and sound three dimensional. I am rambling. But for me, automation, getting crazy with panning, side chain compression, are great mixer tools Im going to learn or get better at using.