I know that in Wizardry 1, (in the Apple version, at least) that your character aged constantly.I had a Evil Ninja and he couldn't travel with the good characters, so I would have to take him down to the dungeon and leave him there and then bring the party down and search for him.
During that time, he aged 6 weeks. So every time, we went into the dungeon, the evil characters aged twice as fast.
I don't know if Wizardry 6 is that way, only because I haven't gotten to that one yet. But I have to edit ages in the early Wizardry's and that can be bad.
For example, my hubby had two full disks with characters that he had played in Wiz 1. When I checked them out, most of them were in their late 40's and 50's. He couldn't figure out why they were sucking as a party.
He is so used to playing Bard's Tale, where ages can be fixed at the Temples. He thought that the same rule had applied in Wizardry.
Suffice to say, I have re-aged his characters down to their late teens and early twenties. He no longer plays with them, but I sometimes do. I make it a point to keep their ages down after I have been playing with them for a few months.
I hope that I haven't gone off the deep end and rattled to no end. I have a tendency to do that on occasions. LOL