Borgata is hands down the best since it is the newest. My mom has been working there since it opened up and in my opinion it blows all the others out of the water. Harrahs isn't too bad either, but the rest are just fading away i guess. Although Caesar's has the walk and the Tropicana has the quarter
I love Harrahs. It has changed a lot with all the renovations. I have noticed a change in the crowds since the pool bar gained popularity. Not particularly a fan of those guests but all in all I think its the best.