I haven't had any problems running the client on my MBP. Just make sure to try to close all the apps you're not using while playing and don't worry about your computer getting too hot, Macbook Pro's have heat sensors that will shut down the computer before it could do any damage to your computer.
I listen to mostly deathcore and rap. Some of my favorite bands would have to be Born Of Osiris, Within The Ruins, After The Burial, Oceano. As far as rap I listen to Robb Bank$, Chris Travis, Yung Simmie, $uicide Boy$, Pro Era, and Earl Sweatshirt.