I always preferred "Scotty! Jim Beam me!"
I had the pleasure of meeting Mr. D (he tells everyone to call him "Jimmy") at two conventions and can say that I have never met a more genuine, warm and charming person (actor anyway).
He treated everyone in a very loving and grandfatherly way.
...just don't ask him what he thinks of Shatner!

Shatner and Nimmoy (blah!) Trek wouldn't have been the same without Jimmy's protrayal of Montgomery Scott!
He was able to keep everyone entertained with his storys and various voices.
My favorite quote was from ST: III, something to the effect of "the more they overtake the plumbing, the easier it is to stop up the drain"
I'd like to convey this humble fan's deepest sympathy to Jimmy's family and wish Mr. Doohan (wherever he may be) eternal serenity.