I would be somewhere between 3 and 4 on that chart. I like choices, I don't like clicking things again and again. I want to play, not play optimise my hotbars. Finishing moves, too much clicky clicky spam. Barbarian Rage at high levels, still too short.
I understand that is part of the DnD feel for some folks to have 20 buffs they cast on themselves before a fight, carry a few dozen weapons, and ropetrick rest after each encounter to refresh spells, but frankly it's just not what I enjoyed back in the day.
I'd like somewhere between a half dozen and 2 dozen abilities hotkeys to hit in normal play. Currently I have a dozen Hotbars open 16 spots unfilled, for about 104 hotkeys. This is on a melee character and includes gear swaps/potions/weapons, and even a hireling or two. For myself, that is more then I want, by about a factor of 10.
The numbers of hotkeys to hit and relearn is one of the reasons I have not gone back to Everquest 2 with its cast orders, and I love my little Ratonga's in that game. The number of hotkeys is a barrier to reentry. If I stop playing DDO, the number of hotkeys I presently have would be discouraging to return to and might stop me as it has stopped me from returning to EQ2.