I seriously have no idea unless I really surf around TV Tropes. I don't doubt that there are author appeals that appear in works like a signature of sorts, but from story to story, there may be different variations, or a new one is used. Or hell, there are multiple clichés that an author likes to use in various ways depending on the story. I myself have kinda noticed that I go for the happy-go-lucky/ditzy female love interest whom the guy is really not all that attracted to, but she's taken such a liking to him that he gives up running from her. They don't fall in love immediately, though--I think only once they don't at all, or at least it's one-sided. I'll have to check through my (many unfinished) stories to see. A lot of these girls tend to be smaller than the guy, too, which I personally find adorable because I'm small, though one's about the same height as the guy--albeit still tiny.
Though I have exceptions when it comes to the happy-go-lucky/ditzy typing. Sometimes, the girl has an attitude, and is not afraid to exploit it. So she and the guy bicker a lot instead of just having the guy getting frustrated at her. One of them also likes to hit, and is pretty... harsh. But by the end, they do warm up to the guy. These are also the girls who do not end up with the love interest. The reasons why differ from the both of them, but yeah, the guys do not get the girl they've grown to like. This only happens in two, maybe three stories of mine.
Speaking of ditzy girls, the reason why they're ditzy is because they tend to have disorders, like autism or just bad memory. Things like that. This could be a case of "write what you know" as I have Asperger's, so for the most part, that just gets thrown in there without my knowing until someone points it out. Twins and/or sister siblings are also pretty common, if only because I have brothers who are twins, and I don't have sisters and always wanted one.
And then I have one that appears to be... growing on me, at least if it has that part of the story: the wife having pregnancy complications. Yeah... not gonna go into too much detail here, but... it's a bit of an inspiration from somewhere. That's all I'll say on that.
So anyhoo, yeah. Those are only a few of what I've noticed in my work, and there are more, but I'm fairly certain that the majority of writers, while they may have a signature style, they at least attempt to do something different with it. Or they don't have a personal preference at all and just write whatever comes to mind. No matter what, you're going to write down a cliché whether you're familiar with what it is or not. So there really shouldn't be an exact favorite cliché that you just stick with every chance you get. Because it'll get noticeable and possibly has your name printed on it in fans' minds, but it can also get old very, very fast. And that's why a lot of people hate clichés, because they did get old very, very fast. But we keep using them because they're still effective. For the most part.