I try to keep things grouped in sections by functionality and place the things that get tweaked the most closest to me (same idea mentioned above). I’m usually sitting for sessions and streams, and have tried a few arrangements where things were being tweaked up high and my shoulder would hurt after 10 minutes so settled on this.

I prefer the bottom case angled as opposed to vertical cases, but it hasn't been too bad having a top vertical case (Intellijel stack).

1U-Drums
3U-Drums, Master processing
3U-Voices, send and return fx
1U-Utility
3U-Filters, envelopes, mixer
3U-Sequencers

ModularGrid Rack