interjection collection, er, what's your predilection?

Not much for "meh," myself. But Ben Yagoda explains who is, and why, with a pronouncement:

Interjections are suitable for online writing, as I say, because of the way online writing mimics speech. But newspaper and magazine writers who spell out interjections and other vocalisms run the risk of coming off as cute—as in yucky ew rather than adorable awwa. Most egregiously abused are what linguists call "discourse markers"—short sounds (it seems a stretch to call them "words") that speakers use to register hesitation, agreement, encouragement, ambivalence, and other responses. Uh, er, and um, in particular, have been flagrantly overused by feature writers and columnists to signal an impending attempt at irony or humor; the maneuver is now well beyond cliché, somewhere in the neighborhood of desperation.