I stayed at the Aladdin in April of last year. It's a pretty nice place, but ranks towards the bottom of casinos where I would go just for atmosphere.
I'm not a gambler either...I went for someone's surprise bday party, so I made the most out of the city and saw what I could.
The few recommendations I have are, hang out at the Paris & the Venetian. The Paris was my favorite...the Venetian has class. Once you get inside most of the casinos, unfortunately they all look exactly the same. I can't understand the Vegas fascination to be honest, but it's a beautiful city at night, as long as you can tolerate 600,000 tourists in your face at every corner you turn. It has a certain romance to it, so if you're going with your wife, my suggestion would be to stay up as late as possible, wait for everyone to die off then go out and enjoy the city to yourselves. It is lit up through the night and the less people in the streets, the more you can relax.
Short advice pieces: Eat at the buffets, if you're going to shop, go to Caeser's, NY, NY has an awesome atmosphere, the Excalibur is trash and is loaded with kids, the Paris waitresses wear the hottest outfits, the Venetian has a Guggenheim for a reasonable price (definitely visit that), see the Belaggio water show if you want to please your little lady & don't waste your time in old Vegas...it's a dump.