Ugh, I don't find them amusing. I'm thankful that they took the time out to comment about my fic, but when it's constantly the same reply after every chapter, "OHMIGOD!!! AWESOME! MORE MORE MORE! NOW NOW NOW!!!" It gets soooo annoying.
Oh, those ones, I really don't find amusing either. It's the ones that are written by someone who
obviously didn't read the story that make me chuckle... because then I can reply to them and tell them that they may want to read the
rest of the story.
I do agree that they don't say anything about the fic and that they can be a little grating if they're repetitive, but it could be worse. They could be trolling the review box. (I've had reviews from someone who was most likely a troll. They were lengthy and nonsensical, and I
still can't make heads or tails of them.) And for that reason, I just let one-liners go.
Do you welcome the use of legendary Pokemon in your fic(s) or try to stay away from them?
Depends completely on the story. In some cases, you just need those legends as vital plot points. In others, you probably are better off without mentioning them. For example, there's a difference between centering an entire fanfiction around the legend of Kyogre and Groudon (which would logically call for an appearance by either or both of them -- possibly Rayquaza as well) and having a trainer start off with Mew/see Mew for no particular reason (that would actually impact the story) other than "it's my fic, and I can have my character meet Mew for no reason if I want to."
Basically, I feel like legendaries aren't really cliches so much as incredibly dramatic elements. They're the gods of the Pokemon world, so a writer really can't throw them in without thinking carefully about
why and
how first. In other words, if you include a legendary, the magnitude of the appearance will probably be dramatic. I mean, this is like getting a chance to climb Mount Olympus and meet Zeus. You've got to have a really good reason for it. Otherwise, you should survive without it.
Myself? I just take the above philosophy. Only one of my stories mentions a legendary Pokemon, and that's because it was inducing the apocalypse. Other than that, none of my work touches legendaries, and I really don't foresee that I will anytime soon. I just don't write about heroes that are that epic (mostly because I'm more interested in the underdog character, rather than the Ash Ketchum character).