Thank you for all of the responses and opinions. Granted I will never please everyone regardless, but here are my thoughts:
1. I prefer poker size over bridge size. I feel that as you look at the board, there is a certain "substantial-ness" with poker size faces that allows for better visibility no matter where you sit at the table, in my opinion. I am in the regular index camp also. I designed the regular index to be bold and larger than other brands. Of course, I see the benefits of those who prefer jumbo index.
2. Based on preference and votes, 4-color decks are likely to be produced in bridge size and jumbo index. However, I am going to challenge the status quo and your color sensibilities. Feel free to print these examples out and see them on your tables. I am not saying these are the best options, but let me know what you think. In addition to these options, I have thought about spades in purple, but this is a big stretch. Because I have an existing 4-color template done in regular index, I am presenting them as such, even though jumbo index will be made.
3. Back design is still up in the air, although, it will be a "casino" design, not an elaborate design. I enjoy Classic Circle and Classic Emporium for different reasons.