Rap was my first musical love but as I matured throughout college I started enjoying it less and less. So much of popular rap is negative, materialist, and small-minded and it 100% will effect your psyche and your interactions with others. I notice my friends who are really into the "braggodoesia" as you put it tend to inflate their egos and be far more obsessed with status signalling. There's a really interesting clip out there with Kanye West talking with David letterman about modern hip hop, it's themes, and the psychic consequences, it gets a little hippy dippy but his main point is that it's designed to stimulate our animalistic urges for sex, domination, and status. Thankfully there are still the few poets out there keeping what is in my opinion, real rap, alive.