Well it's super complicated, and comes down to individual preference. Sometimes you have to ask a question you aren't interested in to get the answer you want. In this case one of the best things I ever seen on mids on amps is a video on overdrive pedals that have prominent mids and those that don't. In this video it's all about the amps though! And it will help you understand what mids do to the sound coming out of your amp.
I hope you will watch it even though you might not think you actually want an overdrive pedal. Spoiler. You need one. You just don't know it yet, and this will help you "buy once" and get the right one when you do
