They all have different "price points." Let's start with gaming: When Caesars only has $25 craps, Flamingo can have $5 craps and Paris can have $10 craps. There are also differences in room rates. I couldn't possibly recommend one casino over another since there are so many individual preferences which go into picking a place to stay at.
I go to Caesars now because I feel comfortable there. But I guess over time I would feel just as comfortable at Ballys or Paris. By the way I enjoyed craps at Ballys.