In defense of predictability... (but also wholeheartedly in favor of novelty)
To be fair, I think some of the people whose taste does fall decidedly outside of the Henry-August-Ava-Marina box don't really understand what compels anyone to work exclusively or near-exclusively from inside of it. Some people might just find themselves unable to move out of that kind of comfort zone or can't bring themselves to be daring. But others might find themselves unable to break out of that box because naming is a compromise, and can you really expect your I-like-Nathan-and-Jessica partner to go along with Ignatius Zimri? Very probably not, so why waste your time with it? As someone whose boyfriend has mentioned that he likes names like Nathan and Jessica (and other stuff that's "normal"), I'm not going to delude myself into thinking that I can get away with the likes of Atticus Tarquin or whatever.
This doesn't mean that I'm a fan of predictability, however. In fact, I feel like I'm being too predictable lately, and it's partly because I'm becoming increasingly annoyed with my own 'filler' middle names, like Violet, Juliet, and Delphine. I can trust them to work with most any name, but when I use them with most any name (and see them around the boards all the time), they get old. This is why we need more users who will suggest something novel - because personally, I don't want to get in a name rut, and who doesn't want to see a Euphemia Agnes Severina or what-have-you among all the Ava Graces, Eleanor Violets, and Rosemary Catherines?
I really wish posters with more unique tastes wouldn't go - they're the best part of this board. I don't want to let myself get talked into Maura Violet or Quentin Nathaniel if I could have Maura Guinevere or Quentin Emrys (or something even more adventurous than those) instead, you know?