What are the advantages of homemade pasta over store-bought?
The best part of making your own food is the ability to experiment!  Sure, you can get spinach or tomato pastas in the store, but is there something else you've always wanted to try?  Try some chili peppers for a Mexican flair, or ginger and leek for Asian foods.  I've heard that even certain fruits work well, and chocolate could form the base for a unique dessert.