I am getting married this year in Oct. and I thought it would be cool to design a deck of cards to go along with the colors and feel of our wedding. I plan to get these printed as the gifts I give my groomsmen, I want to give them one deck in a bottle, and one without the bottle. I have only started designing the back so far and I wanted some critiques concerning what I have so far. I am very new to this and I am still learning.
It's nice, but if you want the gift to be more memorable, a professional photo of the happy couple on the back might be better than just some initials and a ring design. As a deck in a bottle, it would be perfect, assuming the tuck box has a window in the back or has the back design printed on the tuck - it would be a cool alternative to a framed photo! Your design isn't bad, it's just somewhat bland in comparison to the photo option. If you insist on having a two-way back, take a panorama photo and arrange it twice on the card back, top and bottom, each half rotationally symmetrical to the other.
At the very least, consider a color other than pink. You're giving this deck to "the guys," and most guys don't favor pink as a color for playing cards. Try red, green, blue, brown, gray, silver, black, etc.