invaluable, dependable (слэш)

He was home. It always blew Watson’s mind that his idea of home was with the most eccentric man in London-- maybe the world-- writing and helping with cases of all levels of ambiguity, of being comfortable and taken care of.
Watson was initially a soldier, a man who had to face his indecisive mind as to what he should do for a living. But it was so easy around Sherlock. All life consisted of were cases, rides, music, meetings, couches and… and everything Sherlock radiated so effortlessly.