Gonna be really boring and vanilla about this but one of my favourite tropes is that communication is sexy... Two guys that talk their feelings out and it gets them all flustered and happy and a little horned up, it's just so good to me!!! I also really love the whole future fic/post enlistment trope, it's incredibly up my alley!
Oh and I love weddings. I looooooooooove weddings and tropes revolving around weddings. It's always so over the top and can be so dramatic and grandiose because if not then, when!