when I first started using fondant I bought the store bought wilton that was thick and didn't have a good taste. I have been using homemade marshmallow fondant since. Although I have been seeing new types of fondant such as rolled buttercream, just plain rolled fondant and more. I'm just wondering which it the best type of fondant to use on all types of cake flavors and that has a great taste??

Here's a thread that might help:

http://cakecentral.com/cake-decorating-ftopict-742705.html

I'm also currently trying to find a store-bought fondant that tastes good. I've found differing opinions, but most people seem to agree with you on the Wilton. I still need to do some experimenting myself.

Fondarific and Fond-X are popular. You can get samples of 5 flavors of Fondarific for just the shipping charge ($6.00) here: http://www.shop.fondarific.com/product.sc;jsessionid=D72585E061EC6933DE4C3035D0E3967A.qscstrfrnt06?productId=16&categoryId=5
You will get Buttercream, Vanilla, and Chocolate and choose two more. You can see the flavors/colors to choose from here: http://fondarific.com/Dev/?page_id=22

Wow! Thanks for the link, Shanter!

Is there any good homemade fondant that is good other than the marshmallow fondant?

I think a lot of people like this:
http://cakecentral.com/recipe/michele-fosters-fondant
I haven't tried it yet.