As a writer? I really enjoy writing bonding scenes. Not even romantic kinda stuff, but platonic things - like father/daughter cute moments, best friends bonding as they hang out, or when two opposing characters come to respect one another.
As for other scenes?
Romantic: Every time I write them I feel like they're sooooo sappy and it makes me frustrated as hell. Sex? Sure. Cute moments? Got it. Legit romance? FUUUUUUU
Action: I hate writing action scenes, but I always love the result. Writing action for me is like pulling teeth, but when it's done my test readers 9/10 will say it's the strongest part of the story. This is a blessing/curse as I write a heavily action based comic 
Sad: I can write these pretty well, but I don't like doing it. I have to go to really dark places to find a genuine saddness to write from and it can take a toll.