I got into playing guitar during the nu-metal era so drop C was all the rage. I played around with different tunings but found myself going up more and more over the years. Drop D now works for me. It's the happy heavy medium that works best. Every now and then I'll do drop C# just for fun and for extra chug but everything goes back to drop D eventually. I pretty much just do whatever feels and sounds good and it just leads me there every time