Last time I was in Vegas I was there for a convention with my dad so we stayed at the Stratosphere which is at the northern end of the strip about 2 blocks from the convention center. I highly recomend it. It is big enough to be fun and interesting without ovwherlming you. Plus for a huge modern casino, it has the lowest room rates. Check it out, youll pay like $20 less for staying there versus the other hotels.
The Hard Rock is fun though, lots of young people and a cool scene.
Paris for me, was a big disappointment. I really just didnt see the excitement and action and even feature this hotel had compared to some of its competitors. Yes the, outside looks awesome, but thats it.