Royal Minutes is an absolute perfectionist. With skills far beyond anypony else in his field there is always an obstacle to overcome or a kink that can be improved on in his mind to better cater to his customers by producing top of the rage intricate mechanisms and machinery. Though he may come across as having an inflated ego being comprised of the snobby prince Blueblood he is actually quite well rounded thanks to Doctor Whooves adding a certain level of groundedness to him and it makes him quite the critical thinker despite what one might originally think of him.
An absolute workaholic who lives for his calling but we would drop even the most innovative of new clockwork patents in order to spend a few moments with his beloved wife Clumsy Carrot.
When Tashie used to go round the couples' house she would rarely even see Royal Minutes, as he would be tinkering away at something in his workshop, except of course when her bff Clumsy would make a batch of delicious blueberry muffins that would entice anypony to halt their work for a taste of them.
I am sure her sweet loving ways have added to that glorious flank of his combined with years of arching over in uncomfortable positions whilst working to ensure it stays peachy and perky.