I almost always struggle with titling a fic. It's not an easy task if you want something eye catching. I find that unless the author is someone that I really enjoy reading, I avoid "Untitled" like the plague. I mean for drabbles its completely fine, and I shrug it off, but if you're giving me something to read that's more than 200 words, it ought to have a title. Beyond the untitled thing, I haven't really paid attention to it, but perhaps subconciously I avoid fics with titles that don't interest me. I think one word titles can be the most eye-catching as you wonder how it fits. Also very odd sounding titles draw my attention. Its difficult to pin down what exactly makes a title good.