haha yeah I feel you. I never even started to use the yaoi tag. Instead I tag things like shoujo, josei, seinen etc. it's really more effective...
Me too. Some people use really specific tags like megane, long hair, bdsm and etc. But I'm too lazy to be so specific. (〜￣△￣)〜
I've started doing that and now I'm developing a freaking ocd with my tags xD . I still have a lot to tag ╥﹏╥
I wish u good luck. It'll be worth it in the end when finding a manga you've read before become easier.
That moment when you realize that the #yaoi tag no longer helps organizing my manga list, it would be more efficient put a #not-yaoi tag on the few left.