It all depends on what you consider low, medium and high. There is no general agreement on these terms since each manufacturer has their own qualification. For most of them 45-105 is Medium, but look at Rotosound (the Swing Bass series): their Medium set is 40-95, then you have Hybrid which is 40-100, then Standard which is 45-105. 45-100 is considered Regular Light by D'Addario and 45-105 is Hybrid for Ernie Ball. All this obviously makes no sense.
Maybe we should set up a tension scale especially for TalkBass.
Anyway, sorry for that, I'll answer your question. I like the feel of flexible strings on my fretting hand but I mainly play with a pick, and I need firmness on that side to have some control, so the attack is quick and the string doesn't bounce too much (which excludes round-core strings, as far as I'm concerned). So I voted Medium, which for me is 45-105, with possible variations in the case of balanced tension strings, which I really like.
I could play with 40-100 without a problem, but 45-105 also allows me to have what I consider to be a Medium-Low action (2.25 to 2.00mm at the 17th fret) with a minimum of string rattle. 40-95 is too low for me, and I see no particular benefit in going beyond 50-110 in standard tuning. Voilà!
