I'm going to offer the same unasked for advice (I've turned into my dad!!
) that I offered up to milli in his thread. Which you can take or leave.
If you don't already do so, make sure to test your logos out in game.
The maximum size logo in the game is 150x150. What looks good on a 300x300 logo might not look so good on a 150x150. For instance, for your Santa Ana (CA) Adventurers logo, the word California may end up looking like a fuzzy blob. Or most of the wonderful detail on the airship might get blurred together.
The more detail there is on a large logo the less likely you are to see it on a small logo.
Ultimately though, you are the judge of what looks good to you. So, if you like it, more power to you.