I dont usually pan drum overheads 100 % L or R. I think my mixes have IMPROVED since I stopped panning my overheads 100 %. guitars, vocals synths get panned all the way.
I agree with marcus`s statement about panning the direct sounds to match their position in overhead tracks (toms).
but yeah, I understand that most tend to over think the whole panning thing for sure. sometimes less is more