I love the pools of Las Vegas, but to be fair I don't go to just lounge in the sun as I'm a redhead and I will burn to a crisp even with the highest SPF sunscreen. When I think of a great pool, I consider the landscaping, environment, and the extras like Lazy Rivers, water slides, wave pools etc. It's also great when there are several separate spaces so kids and families are separated from those that can day drink peacefully.
Mandalay Bay Beach - Great Pool for Families
MGM Grand - Kid Friendly!
Wynn Las Vegas - Elegant Retreat
Caesar's Palace - Garden of the Gods Pool Oasis
The Mirage Pool