yes High population servers are the best. Even though it gets crowded, you generally are more in the thick of things.
If the servers are numbered, we will choose server number 1 or 2.
If the servers are named like in WoW, then we will choose one with a popular name, like Malice, Skorn, Spite, Naggaroth, Cold One, Druchii, Teznech, Slannesh. Im not bother to spell check these because i have to run but you get the idea.
historically however, most people will chose servers like the ones im describing.