For quicker baking, bake your meatloaf in a muffin tin. Also makes leftovers easier to package (except for meatloaf sandwiches)
I also use a handful or two of oats in my meatloaf.
Meatloaf is quite a flexible dish. Veggies like finely chopped cabbage (cole slaw mix from the bag), corn, carrots, etc can be snuck in. And uit can be almost any nationality depending on the seasonings you use.