Let's try landing in less flat areas
Imagine the images from a rover in Valles Marineris, or atop Olympus Mons! And I can't wait until we finally get a lander to one of the Martian poles.
We should also do more thorough studies of Phobos and Deimos, as they would make excellent, ready-to-go bases for future exploration of Mars.
Plus we do need to learn how they got there and came to be as small potato-shaped worlds, as opposed to our much larger and rounder Luna.