I'm not sure I see any conflict with NMMNG, though I haven't read the book.
But, I can tell you as a woman that the unattractive features of "nice guys" are spinelessness, lack of initiative (for fear doing something might not be what the woman wants), not having one's own opinions and views (for fear the opinions and views might conflict with the woman's), not being able to make choices (for similar fears), doormatting, not standing up for oneself, not being strong, not showing leadership, being too sensitive in that the woman has to coddle the man like a child, and so on...
As far as I can tell, you aren't doing those things. Indeed, all your current actions are taking you in the opposite direction on every point I mentioned.
I see no problem with being generous (without self-sacrificing or abasement), considerate, thoughtful, caring, and genuinely compassionate.
You are acting much more like a strong, happy man rather than a pouty, angry, and resentful child. That is certainly far more attractive. So, no, I'm not seeing how that conflicts with NMMNG. And, if it does, so much the worse for NMMNG.
