I'd like to understand the various AFVs better. What are their strengths and weaknesses? So explain which AFV you prefer and why you prefer it (more than one, if you have different favorites for different situations).
I'll start. I prefer the Apollo 120mm for most scenarios (particularly if there is any space to maneuver). It's quick, so difficult to hit from a distance, yet can gobble up big distances in a hurry. The tracks are able to climb almost anything and it is hard to tip (except on low grav moons when firing to the sides-the recoil flips it over); also the tracks seem impervious to failure, unlike tires. It's front is fairly well armored, and if you can keep it facing an enemy (other than another 120mm or ATGM), it is difficult to kill before it kills its target. Finally, the 120mm gun has immense killing power, you can knock out anything with a single shot, providing you hit it in the right spot.
The important thing to remember when using the Apollo is "keep moving" and try to maintain a good deal of separation from your targets. Your sides and back are vulnerable, so limit their exposure, if possible. It is particularly effective in the hunter-killer role, where its speed, maneuverablity, and killing power let it shine.