500-Word Statement

I researched a bunch of art promotional materials online (specifically post cards), and came up with a few ideas. I saw a lot of graphic design-like cards, and a lot of them utilized the back of the poscard as well. Often, people would draw their own little stamp for the area where the stamp goes, giving it more of a personal touch. I also found quite a few that would unify the back design to match the front, so it would look like a package that they themselves wrote the information on. I had not considered really working on the back, and if we can I think that would be cool.
Another option of post cards I have seen in my research is making them have images on both sides. Rather than them be mailable, they are purely promotional and can be given out for those purposes. I had considered this, but I feel like those would be thrown away. I think a postcard that can be mailed can be appreciated for what it is, give publicity and be used by the person who receives/purchases it.
So, since mine is a promotional post card for myself, I want to make sure I make something that looks good, gets attention and exhibits a little of what I can do. I have came up with a few drawings to scan and fool around with in photoshop, but they are all based on the idea of having different elements all in the same drawing that are very different. In one, I drew a little girl with a giant monster. This can, I hope, show the diversity of my talents in Illustration, which would help with the self-promotion.
This brings on the problem of if I want to color them digitally or traditionally. A mixture of both would also show the diversity, but I'm not sure if that would flow very well. I have also considered doing the front in traditional and the back digitally, or vice versa, but it would not come out as unified as the examples I saw, and that seemed to be something that worked very well for them. I definitely want to design a stamp for it that works well with my larger design, because I thought that was a clever little touch to the overall postcard.
I have also thought about the information I want to put on the back, and I figure I need my name (obviously), art blog, e-mail and information on what I do. Maybe something clever? This is something to consider. Also, I recall it being mentioned in class we might be able to get these cut into a specific shape...I would like to have it cut out around my image if that is possible, but if not I would rather it be the traditional rectangle than another shape.

On a side-note for the research, some other things found include: business cards that fold out into big posters, designed envelopes, books, regular business cards, badges, coasters and stickers.