I've stayed there when work was footing the bill for an industry conference, the room was alright but not nearly as nice as I thought it would be given the glitz of the rest of the place. My boss' boss stayed at Palazzo and we had a group meeting in his room/suite one morning, it was insane.
I've stayed at Aria with the wife, a much nicer room and floor/lobby/restaurants imho.
When I go with buddies we stay at Bally's and barely spay any time in the hotel/casino so who cares?
Table staff pretty much anywhere is friendly and professional up and down the strip, I don't think you'll find a huge change there if that's something you care about. I mostly play craps and the fastest/best/however you care to rank them, craps dealer I've ever seen was at the Cromwell(dice would hit the wall and land, stock man would call out the number, and you'd look down and your payout was sitting on the felt in front of you, she was already done) and they have good tables for roulette, craps, blackjack if those are your thing. Best dealers for chatting with are down on freemont, the old guys who've been dealing for 40 years and just crack jokes the entire time.