My seed (FlipTaco) is pretty odd, that's for sure. It primarily features floating land masses, odd overhangs, and pumpkins. All of the screenshots include the coordinates of their location in the upper left.
Pumpkins, pumpkins everywhere:
I also found a dungeon near the surface, just inside the opening to a cave:
The world isn't all too unusual though, since a fair portion of it (60-65 percent estimate) looks like this:
The rest of the terrain, however, is quite unusual. Large, flat-edged structures litter flat lands, patches of ground are riddled with holes revealing the stone underneath, and there are quite a few instances of floating sand around desert biomes and other sandy area.
Nothing special really. Large amounts of pumpkins and clay though, at least compared to most maps I've tried. Most interesting feature perhaps is the underwater sinkhole seen in the picture above (the rest of the squids got sucked into the cave below the lava).
My seed metholus gives a hill world, not big or deep, some lakes, and cacti and sugercane is easy to find, altrught I don´t know how rear that is.
But when diging my base I find 3-5 iron ore at the first 5X5, I tried two times and the same thing happened, and when mining I got seriusly lost and when returning from it I had a litle over a full stack of iron ore.
The seed: therex1222 This seed pits you on an island with tons of trees. This picture is of the island across from spawn.
This is the island spawn.
If you explore, you will find a few pumpkins, perfect for defense against endermen in the 1.8 update coming.