Oh jeez. Um. My favorites would have to be: Portal block Untextured Block (my hat right now on .net) Emerald Packed Ice Spruce Leaves over something light. It makes a really pretty contrast
Well when you say block you could mean the shape of a block, or the colour of a block.... For the shape of block I would go with stairs. They can be placed upside down, other directions and can curve at corners. They add variation to minecraft as it is easier to make it smoother with stairs. For the colour/texture... I would go for... All the types of wood. I love wood! Just not in that way
Stone slab Blue wool Cyan wool Sea lantern thingy Smooth andestite Coarse dirt Spruce leaves Smooth diorite
Quartz block Coal block Green and lime wool grey wool Black wool Any green and black block And birch logs and planks
slimeblocks in 1.8 by farrr I love to go on single player and fall on them from great heights and just... bounce... bounce.. bounce...