This is all based on personal opinion.
Laxus & Freed I have nothing against yaoi and I think this ship is cute but I doubt it will ever happen
Gray & Lucy *Sigh* I really dislike this ship, it will never EVER happen "But Mikazuki, there has been so many Gray and Lucy moments." Well I don't care The stripper stays with the stalker and the princess stays with the dragon, THE END!
Erza & Natsu ok now, I know there has been Erza and Natsu moments but I see them more as brother and sister relationship. Also I am a hardcore Jerza and Nalu fan so I completely disagree with this. I didn't like Gray with Lucy but I HATE Natsu with Erza.