Wow this airport is always busy! Despite that, I've never had a bad experience here; and I fly often too. Security usually goes by quicker than you expect, and I like the way they separate into sections with the gates. I always fly Southwest and I like how getting to its wing is very easy and, you can even use the tram.
My favorite part is the way they have their parking garage. I like their pick up area system, as its on the 2nd floor and there's and easy walkway bridge to get to it.
For an old airport, it's pretty nice. I also always thought it was cool that is has slots all throughout for those waiting on their flights, keeping that Las Vegas theme and differentiating themselves from a typical airport everywhere else