Proud member of the Cult of the New.
The King of Meeples
To front. to answer your question, I am only really trying to modify the face of a single card, that I would then use as a logo/avatar. I don't even need to print a full deck or anything.
front or back?
and more to the point, why?
There are three general idea approaches iconic, logo promoting, and classic long play. By iconic I mean the cards you buy in a gift shop that have the picture of the grand canyon or something, usually meant for casual family play. Logo orientated usually just plasters the casino logo on them. They will be used just briefly by the casino then sold off. The classic usually is the small repetitious pattern covering the card with some color and white. Meant to look nice and as it wears and gets scratched the design will try to hide it.
typically the numbers in the corner is all thats accepted as standard. Other trends include pips as the center art as some games use them as scoring or other secondary uses. Color is kept black and red being tradition and at this point rules say red and black so why hassle saying something different, same for suits.
Is any of that useful, or are you looking for where to ask artists to design something for you?