Actually I took some advice once, then other people started to tell me the same damn thing multiple times. That is when I got pissy, though to date I don't remember much of the exactly advice/arguments it was started on, but even then that was before the stam-stacking craze got into full swing and stuff had challenge to it. Still remember doing Xt002 before they nerfed it so his tantrums wouldn't kill everyone in 10 seconds.
It's a moot point now, you are onto the next shiny MMO and as long as you are having fun that's all that matters. I'm sure you'll be back for cata at least for a month or so before the same frustrations come back from new and interesting angles due to Blizz's constant noobifying gameplay.
For the record, I think there is a point where the gear becomes less of a factor and positioning/awareness has to step up, and I was usually in the positioning/awareness camp. I knew when I needed to upgrade something and I knew when it was more about where to drag/move bosses/adds and what is going on to keep people from getting hit with crap even if you had a couple of people not paying attention and getting hit anyway.
I think the present thing I am obstinate about is the mongoose-bandwagon for weapon enchants but I don't think that came up in StK. I see all the stats and data it can add when it procs and how often it procs, but I just don't think it is so much more worth it over other enchants.