Animal Prints - Cool idea, zebra stripes, cheetah spots other good ideas for animals.
Camoflauge - I think this would be one of the most successful if we made it because recently everyone has been very into all of the different camoflauge ones, so i think this would be a wonderful idea.
Beach - Cute idea, maybe with sand, and beach ball with the ocean waves. I have the ocean wave V3 tamagotchi, and i very much like it
Sports - I like the idea, maybe tama sports? like in the game, bouncing ball, track finish line, just ideas, could be very cute with some unique twists.
Candy - I think this also would be very popular because many younger kids and older kids enjoy different kinds of candy and with a few different varities people could pick their favorites!
Makeup - Not very good idea, boys would never want it and not all girls are those kind of girls and even girls that are might not be interested.
Toys - Another cute idea, maybe the tama toys, wig, bubbles, i would buy one
Food - Exactly like the toys. ^ hamburger, fries, sundae, bread ect.
Tamacharacters - Well there are 4 main tamagotchis i would use, mimitchi, mametchi, memitchi, and maskutchi. Those 4 tamagotchis seem to be the most popular amoung everyone, but maybe swap the maskutchi for a kuchipatchi or robotchi.
Solid Colors - To plain, very boring
Transulent - Interesting idea, not any comments though
Seasons - Good idea, maybe light sunny colors for summer, brown, orange and yellow colors for fall, white and blue for winter and green and pink for spring.
Flowers - Good idea, but seasons would probably be better, and not all boys enjoy pretty flowers.
Well thats my opinion, but my overall number one pick would be camoflauge!
-RR