I personally think that many people put way too much emphasis on min/maxing everything from builds to even the class they choose to play.
If you want to play the game and not quit a month or so in to it, play something that you find enjoyable. This whole min/maxing is ridiculous.
I am just as guilty of it as I was trying to figure out which was better in classic between mage and warlock. Then I got to thinking about it, and I realized that what I truly enjoyed playing the most back in the day was my rogue. So, that's what I am going to do.
If you want to theory craft and min/max it up, more power to you, but honestly, everyone is going to be just fine playing any class with any build they choose. Yeah. Mob-XYZ might not die in under 5 seconds if you don't pull the exact perfect build, but guess what. He's going to fucking die.