Which hotel is the best for families as far as the best arcade area, pool, and large room size (excluding circus,circus, stato, and excalibur). How's the Aladdin?

Without a doubt, the arcade at NYNY is the best for kids.

I found the arcade at Treasure Island great for kids. There was only one way in and out so they could not disappear on you. Plus there was a large assortment of games, easy to win prizes, and tickets to accumulate. The tickets are then redeemed for even bigger prizes.
I was a little disappointed in the pool area. It was just a regular pool, and the lounge chair area was quite close.
The rooms here were average (2 double beds) but there was plenty of space for 2 adults and 2 kids.

It's not associated with a hotel, but there's a Gameworks next to the MGM, across the street from the Monte Carlo. Gameworks blows any of the arcades away!!

Treasure Island.

THE ARCADE AT TREASURE ISLAND IS NOT THERE ANYMORE;now a restaurant