As absurd as it is, I'm mostly a member of M-Life rewards because of the Buffet Americana. The food options are fantastic at the casino. However, the selection of games is MUCH smaller, and most of the table games are a little higher minimum bet than you could play downstairs. They do have a second floor SMOKE-FREE casino that is nice because you can breathe a little bit up there.
Gold Strike has a better selection of games all-around, in my opinion, than the other casinos. I'm a slot machine guy myself, and do okay at Gold Strike, but maybe not as good as Roadhouse two doors down. Most people I know, who gamble, enjoy Gold Strike for their table games. Besides the fact that the casino literally sticks out because of the gold flashing lights, it sticks out to me as the best of the three casinos (at casino center).
Being located next to two Total Rewards (Caesars Entertainment) Casinos, it could be easy for Gold Strike to just be another casino. I can't speak highly enough of the staff at Gold Strike, and really the entire MGM company as a whole.