I died twice at level 70, so that accounts for 3 of them. I have a character in warbands for challenges, and I have an alt on tempest for the 82s challenge and another for a dreamfeather build that I somewhat ditched for now because of how hard it is to survive as an evasion melee now. I'll probably be making an alt on warbands for an ice spear build idea soon.
I do like theorycrafting quite a bit, most people who know me can tell you that I come up with stupid build ideas pretty much daily. If you want some help coming up with stupid builds I can do that for you
I do generally enjoy leveling in PoE, it only starts to feel tedious for me around mid 50s-60s when it starts slowing down but you're still so far from the final vision of your build (since most build enabling end game uniques are mid-upper 60s). I'd still rather level a new character than grind 250 maps to go from 89 to 90 while finding nothing of value along the way.