This was tough----a lot of my favorite numbers are on this list. Hard to choose between 14,17, and 18. I finally voted for 12 because it's evenly divisible by 2,3,4, and 6. That's four numbers (not counting itself and one, of course). That's a lot of divisors for such a small number. Sure, 18 has 2,3,6, and 9 but look how much bigger 18 is than 12! 12 is amazing!
Rooster, why so down on 16? It is, after all, 2 times 8, and eight is great.