Once I have played a game through with no mods or cheats I get enjoyable playtime from exploring the "corners"
of a game and mods that make it easy to do that i find to be fun.
I recall creating a Fallout 3 character with low stats except for luck and strength which I maxed via the console
and then played the game through with out using other console cheats and it was a lot of fun
but if I had a full character editor for that game I can think of lots of other stuff that would be fun to try.
A full Character and save game editor is one tool that I have enjoyed on other games. I know you can make a character
any way you want in the console but that is both clunky and slow
So I would be a user for a mod that included a character editor.