I did the Blue Lions route and these were my parings:
Romantic:
-Byleth x Felix - 10/10
-Dedue x Shamir - I thought this was a very sweet pairing
-Ingrid x Sylvain - For this I was both surprised and not surprised
Non-romantic:
-Annette x Mercedes - It was nice, but a little expected which made it a little bland imo
-Dorothea x Manuela - It's sad that neither of them got love, but it's also good that together they don't need a man
-Seteth x Flayn - Both sweet and a little sad
Since this was my first playthrough of the game, the only one I planned was Byleth x Felix