If he could choose your wedding dress, because i don't know what you'd want personally.
Sherlock:
He wanted something simple but elegant. He didn't really care what dress you would wear because he thought you looked beautiful in everything.
John:
He wanted the dress to be elegant and classy. He liked that the dress was shorter, it was cute.
Moriarty:
Jim wanted something grand. You're his princess and nothing will ever be good enough for you.
Greg:
He didn't know what kind of dress he wanted for you but he liked this one. It was elegant and beautiful, just like you.
Mycroft:
He wanted something special for you. He wanted you to look like the queen he's always though you were.