More slab blocks
Slabs/Stairs that can be placed on the ceiling/upside down
Rugs
More craftable furniture
Diagonal-connecting fences/iron bars/glass panes
More mobs, both hostile and peaceful (and which DON'T alter the landscape)
Planting pots
More foliage (more flowers/plants/trees/etc. that have different benefits)
Climbable vines
Implement Zeppelin mod
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
(Mah ship shall sail!)
Ropes (like ladders, but can hang straight down, without toughing anything)
Alternate methods of creating power (waterwheels, windmills, solar panels, batteries, gas/oil pockets, etc)
Sheep regrowing wool >.<
Whales!
Selection of paintings to place, instead of randomized
Steeper stairs (stairs that are 2 blocks high, but can still be climbed without jumping)
Quivers
More weapons (Battleaxes, staff, crossbow, etc)
Shields
Customizable FLAGS.
Oh, I could go on and on in this one...