1. Don't be afraid to stretch
In my experience one of the biggest mistakes that drummers make when playing Brazilian music is that they get so caught up in trying to play the groove "correctly" that they forget to try to make music. One of the really beautiful things about Brazilian music in general is how it is infused with the spirit of improvisation, so don't be afraid to experiment and go with your instincts!
For example in the recording of "How Insensitive" at the top (with Chris Grasso on piano and Zack Pride on bass, make sure to listen with headphones), listen to how I start out with by just sketching a rhythm with my right hand during the A section of the melody, or how I go into a kind of weird Bolero on the snare drum on the vamp out. These things aren't really textbook or correct playing, I just thought they sounded good at the time.
Speaking of sounding good, how sick was that bass solo?! Zack Pride ladies and gentleman.
2. Check out Milton Banana
My excellent teacher Chuck Redd suggested that I check out some Milton Banana to help deepen my Brazilian concept. I have absolutely loved learning about his music, and I highly recommend that everyone who wants to learn about Brazilian drumming make this a priority. One thing I immediately noticed about the way Milton grooves is how he uses a strong bass drum (particularly on beats two and four) and an ever so slightly swung eighth note feel to give a strong, earthy samba feel to everything he plays. Listen:
If like me you have somehow gotten to this point in your life without checking out this fantastic book by Duduka da Fonsceca and Bob Weiner, there is no time like the present. Here is a solid write up from Cruiseshipdrummer on all the relevant literature. Books like this can help you get a lot of essential information fast, but it is important to remember that you need lots of listening/application/experience for all of it to be useful.