how much do i like to tinker? very little, i like to plug in and it works from start, only tinker if adding new drives, parts, etc
do i care about noise and power? no not really, i mean sure no noise and little power would be a nice addition but wouldn't bother me that much
how many tb we thinking? without going to each pc and checking i would say around 3-4 tb but its very likely yo grow a ton in the future, as im a hoarder and dont delete shit