Tropes I love:
"Campfire" scenes. Before the big fight, characters get together one last time. Then all hell breaks loose. I like the feels.
The wise mentor. Mostly because I see myself as this character if I was in the fantasy, but nothing beats that wise mentor. Extra points if the writer manages not to kill them off as a way to create fake emotion, or fix plotholes.
Father/son dynamics. Good ole heartstrings.
Tropes I hate:
My biggest, BIGGEST trope I hate are abilities that aren't grounded, and are under developed. I'm looking mostly at wizards and simple elemental powers as a copout. I hate wizards. They have access to any spell they want when it calls for it--all they have to do is mix some ingredients and say some words? Why? Where does this power come from? Thin air? Or when the book claims to be about cool superpowers, but when you read it, all they can do is shoot fire from their fingers, and if we're lucky, manipulate some water. Is that really all there is? The exception is Avatar, the Last Airbender, because the four elements are not only central to the theme of the story, but you also understand how the power is created. I wish writers would look beyond the "world building," and build cool powers. However, I'm into magical realism, which isn't what dominates fantasy.
Virtually any high fantasy trope. Elves, races, focus on unique language for the sake of padding.
Characters that aren't flawed. I think fantasy writers are really prone to this. We spend so much time crafting this cool characters. The way they look, their history, the history of the people connect to them. Their powers (hopefully). What they love and hate. We fall in love with these character. And because of that, we become scared of throwing them down the stairs. Throw them down the stairs! Why was Katniss more compelling than Triss from Divergent? Because one had "real" flaws. One made pretty questionable bad decisions. (That said, there is an extreme, where the opposite effect happens. I'm looking at you, the ending of Mocking Jay.)
And finally. Fluff... fluff, fluff, fluff! Another high fantasy trait, which many probably would enjoy. But dear god, does fantasy cover itself in fluff. We could learn a thing or two by reading high octane thrillers. I don't want to spend 4000 words in a flashback that really doesn't add anything to the story, and could had been incorporated in less than 500 words. I don't want to spend 3500 words walking through your magical town for the heck of it. I don't want 3000 words of what it was like flying for the first time on the back of your dragon. This kind of goes hand-in-hand with not wanting to throw your character down the stairs. "But Antipode, it's an important scene. It shows how happy the character is that they can finally fly. They worked so hard. Don't you want to experience that feeling with them?" No, I don't. I want them to get on that dragon, feel a sense of pride, and then be shot down by an army heading to his city. But because he decided to take the dragon out without asking, he's too far outside the city to warn them about the army. And his family is there. They're going to be slaughtered if the MC doesn't figure out something. Or maybe he reaps the consequence.
I'm a huge anti-fluff fan. It's so bad, that it rubbed off on my roommate, who now notices and gets annoyed when she sees fluff in movies.