People names are always a problem.
Thanks for going to great pains to provide lots of interesting lists to choose from. We may want to make a special note that categories that include names of famous or even non-famous people, living or dead, can be quite problematic for Legal. I would eliminate those categories entirely. --pfrields 15:47, 3 May 2012 (UTC)
Try to avoid Americanisms.
I agree with User:Pfrields comments - thanks for doing this. We need to try and avoid words that mean different things or are confusing in other countries. e.g. In Europe a Cookie is a particular type of confectionary not a general name for sweets. --deep64blue 12:05, 16 May 2012 (UTC)
Another suggestion - names of microbes
There's a lot of interesting names there.
I think names and visual themes need been correlated. Then, being too much specific, like "coffee names", "herb names" and so on, can make a very monothone universe of choices. I like the idea of "science and historical discovery", because it gives very very very freedom to "not monothones themes".