Opposites Attract
Strong relationships, in both TV and real life, thrive on how each member compensates for the other’s weaknesses with his/her own strengths, and vice versa.

A Motormouth just isn’t as funny if he doesn’t have the Straight Man to torment. Similarly, only when a sweet, shy person is paired up with an equally jerkish one is their kindness and timidness made all the more noticeable.

It is all but guaranteed that the characters’ differences will cause more friction than harmony between them. That’s what gives the Odd Couple its fuel for Slap-Slap-Kiss, Will They or Won't They?, and Aww, Look! They Really Do Love Each Other situations. Bickering and mushiness in one package. What’s not to like?

Time Travel Romance
Time travel provides all kinds of possibilities for a romance arc: some of them comic, some of them tragic, and some of them bittersweet. As a comedy trope, time travel can result in a culture clash between two otherwise suited people, since different times have different manners and mores. More dramatically, a time travel plot may force a protagonist to make a decision between returning home or staying in a different era. Time travel can also serve as a force which reluctantly separates the couple, if one must return to his or her original time. Time travel can sometimes result in the ultimate Long Distance Relationship, if the couple tries to make it work despite the time barrier.

Wacky Marriage Proposal
Marriage. True love. However you put it, the union between two (or more) people is a sacred commitment that should be undertaken with the utmost seriousness.

Except in TV land! There, a man might propose marriage to a woman by building giant letters out of burning gelatin. He could dress up like a knight in shining armor. However he does it, it's going to be funny.

For me this is.

Again depends on the couple ;) There are tons of 'opposites attract' couples that I NOTP, but when the right one comes along.. {Suliet, Bamon, Towen..}

That being said, I usually prefer couples that have a fierce understanding of each other, and can relate well to each other, without being exactly identical.

Although the Shules proposal was amazing

Yeah!!

My second biggest OTP is The Doctor and River and they are definitely a time travel romance (seeing how they are BOTH time travelers) but overall I do prefer the opposites attract trope. It doesn't always work, but when it does...<3

Honorable mention for the proposal one...Barney proposing to Robin, best proposal ever<333333

All <3