I know that being a more Mustachian type than most people really moves the baseline as to what you consider to be "good with finances" and "bad with finances". I've always been pretty frugal but am much more so now; I consider my previous spending habits excessive even though I was still saving 40-50% of my money (depending on the year). I got crap for how frugal I was THEN. Mind you, I make a good salary so spending that much is quite a bit of money (although below the national average I'm sure).
For example, my sister was telling me about a guy she was dating; she was considering breaking up with him and was listing some of his good/bad qualities. She said, "He's great with finances." I pointed out how often he gets hammered at the bar and said that didn't strike me as great with finances. She said, "He has no debt." I pointed out how, sure, he doesn't have debt, but he spends all his money on what I consider to be toys (nice truck, Harley motorcycle) and has a little savings but doesn't seem to have a long-term savings goal. She said, "Well, it's not bad for someone who's 26." It's a fair point. Sure, I don't see his expenses as great since he's buying depreciating assets instead of investing. However, to her (and most people), he's not doing bad since he doesn't have a loan on them. He really isn't in a bad situation, but since I don't see it as ideal for me, I tend to still see it as "bad with finances".
For a lot of people, including my other sister and my dad, being "good with finances" means being able to balance your check book and making sure you don't overdraft on your account. It means paying your bills on time, including your credit card even if you carry a $5K balance at 20%. To me, it's maintaining at least a 50% savings rate. I have to keep that in mind when discussing finances with people outside of this forum.