It's easier for me to list the tropes I don't love!
But my absolute favorites are:
Love at the first sight: yes, it is much maligned, but when writers manage to catch the spirit of that realization that this stranger in front of you is someone who captivates you, it's glorious
Enemies to Lovers or Rivalry romances: the bickering and the tension is hard to match, and they usually necessitate an interesting set up
Polyamory: I am not big on One true Love, I love the dynamic of relationship that reflect attraction and eyes wide-opened of a more pragmatic or mature love
On the other end of the spectrum, Unrequited Love also makes my day