Lawler vs MacDonald 2 is probably the one highly touted fight which just doesn't do much for me. Just not enough drama for it to be a great fight, in my opinion. McGregor vs Diaz 2 was much more dramatic for me. You had the story from the first fight playing into the second. Conor was off to a great start again, but would he gas and go down if he couldn't put Diaz away?
He dropped Diaz several times, which is impressive in it's own right, and then Diaz seemed to mount a comeback in the later rounds. It wasn't enough to win but it was enough to make the fight really fun. Lots of drama there and a good, natural story told over the course of their fights. Diaz vs McGregor 2 was the better fight for me.