In our last band, AC/DC was frowned upon. The bassist didn't dig them....so we did tons of Led Zeppelin....which was really cool to me.
There was also an unwillingness to do drop tuned Eb songs.
I've always preferred Eb and rather than change guitars for certain songs, I prefer to just tune to Eb and stay there. On long nights, it really helps the vocalist.
We got tapped one night to cover three different bands that cancelled at three different Palm Springs casinos. That worked out to be 6 hours (3 two hour Performances with 15 minutes off on the hour) and our singer would have never been able to pull it off tuned to standard.
I'm the logistics guy. I'm thinking about cable length, equipment weight, drummer longevity, singer's vocal endurance and all that sort of thing...