Might as well rename the thread to "what do you think of all the maps"
Mirage: A good map in all respects, although it sees limited usage in side paths by the majority, and prone to sniper fests (F4? F5? D8? Both those areas, on both sides of the buildings closest to the IS base).
Sandblasted: A mediocre map in my opinion, with heavy reliance on long range and aero superiority. Fighting usually gravitates to one side of the map, where both teams are either in Novacats, Shivas, Catapults, or Huits waiting for a NARC or some moron to step out.
Marshes: My favourite map, although a coordinated team with a Tom and a pair of NARCers for missile boats will probably push the other team's face in until they can organize a counter push (unlikely). Great long range and short range options, with the hills providing cover or avenues of attack, while no man's land along the airstrip forces you to choose between sneaking around the side or moving quickly through the center.
Thunder Rift: A great map, limited by the fact that nobody plays towards the southern half of the map (away from the bridge), and the ability to snipe from just about anywhere. The water's pretty annoying too, since it's hard at times to navigate. The multi-tier layout, however, makes for great jumpjet ambush opportunities against unwary opponents.
Extremity: Better since the revamp, although for some reason, everybody heads for the HPG stations, which, in my opinion, are death traps. Lighting needs to be worked on; too harsh during the day, too dark during the night.
Inferno: An interesting map, made difficult by frustrating lava flows, falling through hangar floors, no ability to walk through hangar walls to the outside, and the fact that nobody sends a lance around the outside. Also, those god damned VTOLs.
Clearcut: Those damned trees. Also, very prone to sniping, and the small map allows for you to sit around in a Tom (not recommended), a Huit (more recommended), or a Shiva doing 30 second Fbomb runs (not recommended, you cheesy cheesemonger). Beautiful looking though, but it needs more cover to be awesomer.
Frostbite: Those damn trees, and those damn blizzards. Layout's good, but the map is wider than it needs to be, I feel. I've never walked around in the first 2 columns of the grid. If only thermal imaging worked...