Sherlock -

You: (Y/N), Sergeant Sassy
Him: Sherlock, Sherly, Sherl, cheekbones, blue eyes, Curl-lock

Mycroft-

You: (Y/N), dearest, cookie
Him: Myc, My, Cake whore, darling, Chocovore

Moriarty -

You: My Queen, beautiful, gorgeous, love
Him: Jamie, My King, handsome, sexy, love

John-

You: Love, Darling
Him: love, Dr. Sexy, dork, blondie

Greg-

You: Gorgeous, love, darling, sweetie, babe
Him: Love, Detective, hot stuff, Gavin, George, Gerard, Gerald, Gary, Giovanni, Gabriel, Gaston, Gino, Grover, Gunther, Giuseppe, Gustav, Garrett, Graham, Griffin, Grant, Guillermo, Gilbert, Gideon, Gunnar