gifs for love tropes

Gifs for a challenge at TV_universe to do fanart for some popular love tropes. You kinda have to know Firefly to get these, maybe. Check out TV Tropes for an explanation of these tropes!
--Meet Cute
--The Four Loves: agape, etc.
--Flirting under Fire
( Gifs here... )

gifs for love tropes 2

More...
--Everyone Can See It
--My Favorite Pairing (also an alternate for Moment Killer)
--Headbutt of Love
.

( Gifs here... )

gifs for love tropes 3

And more!
--Like an Old Married Couple (well, they are a married couple...)
--Moment Killer (hahah)
--I Will Find You

( Gifs here... )