My own monogram/logo

I've been trying to come up with my own monogram or logo for some years now. It has been quite complicated since I normally use the initials of all four of my names and couldn't quite put all four together in a satisfactory monogram. Most monograms I see after all incorporate just two or three letters. But I finally came up with an idea the other day and couldn't wait to actually put it down on paper so to speak. So I stayed up until the wee hours of the morning today (actually I fell asleep early and somehow woke up at 2am) working with Adobe Photoshop to make it. I initially came up with the first one shown below and later another one with the colors inverted which I believe looks better, don't you?
I decided to make one for my sister as well since all I had to do was switch the first two letters and modify the "C" to look more like an "E".
I'm hoping to turn these into stamps (or perhaps stickers?) that my sister and I can use to mark our books, etc.