Great basic collection. Depending on the colors you use with them, there's no limit to what you can do.
Don't forget that BG stamps and EFs can be effective when used together! Here's a card I recently did (I actually did two versions) using IO's Crisscross and then the Petal A Plenty EF.
Crisscross Daisy Notecard
The card would have looked fine with either just the BG stamping or just the embossing, but when combined, it's a whole other look.