If you're looking for above and beyond standard bacon profile for flavors... Crushed Peppercorns, Crushed garlic (for God's sake do not use a garlic press, just smash it w/ the side of a knife), Bay Leaves, Molasses, Red Chili Flakes, etc..
The biggest thing you can do for your homemade bacon is smoke it rather than oven it... but since you're here i'd assume that this will not be an issue!