Hi Marcia.
When it comes to casual games, I rely heavily on
Gamezebo to get a better understanding of a new (or old) casual game.
They offer a Gamezebos Top Ten List which features 3 lists
Most Popular Games
Gamezebo Ratings
Users Ratings
for the last 90 days.
The reviews section for every game is very comprehensive.
Pros/Cons
Screenshots
Tips & Tricks
A link to download the demo
(although be mindful as they do sometimes link to sites some fellow GameBoomers find untrustworthy for downloads).
They also preview the upcoming games.
And they have a nice Steals & Deals section.
They break the genres down fairly usefully, as I sometimes find discovering the "type" of game daunting.
I find it to be a very useful and informative site built for the casual gamer!