worry about my own attempts at writing Wonder Woman.
That bugs me. She's not hard to get. She can be a bit tricky, because she's nuanced in surprising ways that, like say, Superman isn't, really. But he doesn't need to be.
Wonder Woman is a proud, introspective, helper person. Even if you remove her "Spirit of Truth" aspect (which would be silly, like removing Batman's detective aspect--oh wait--or Superman's friend to everyone aspect--oh wait), she still has a rigid sense of honor (a warrior's honor, but she wasn't raised by hippies, she was raised by Amazons, dammit) and an almost uncanny sense of self. She is compassionate almost to the point of self-sacrifice, but she also has a temper (especially in her early career), and woe betide any who are on the wrong end of a flare-up. She's well aware of her abilities, but not to the point of arrogance (I don't think she has an arrogant bone in her body), and she tries to be fair and nonjudgemental. She's the best person to seek advice from, because she'll listen and try to guide you to what you need, not tell you what you need.
Sounds marysue-ish, almost. But she tends not to get involved where she knows she'd be a hindrance (whereas a mary sue doesn't think she can be one), and is much more likely to try to get other people to work through their own problems. She'll just keep things from escalating until they do, and if she can't, she'll save lives until they do. And if they still don't, then she'll bring her full Amazon training and god-gifted abilities to bear.
Aaron "The Mad Whitaker" Bourque; I think the main problem with writing Diana is that she has such a strong sense of self-identity, it thwarts most writers' tricks. Kill her mother, she won't really angst much: she'll mourn and get over it. Give her guilt, and she'll work through it and try to make amends and if she can't she won't. Try to attack her gender, she'll just raise her eyebrow and try not to roll over laughing. Try to define her by sexuality, and she'll be like "I been boinking people off-panel for decades now, this is nothing new." And when you make her angst (about being a fucking golem, what the fuck) it just looks so wrong, anyone who actually knows anything about her would know that's not Diana