Oak Wood - Darker texture, less moss
Birch Wood - Lighter texture, more like default colour.
Jungle Wood - Too mossy, more brown
Iron Block - Too fake,more realistic
Gold Block - Too fake,more realistic
Bricks - Darker texture, more variation in the bricks
Stone Bricks - Touch of rose colour, make it more like coblestone's colour
Chiseled Stone Bricks - Make them look like chiseled stone bricks, not bricks, I think texture is mess up.
Cracked Stone Bricks - Texture is messed up, make them look like cracked stonebricks, with a colour similar to cobble
Brick Stairs - Darker and more variation in the bricks
Endstone - More definition, more darkgreys, bit more realistic
Emerald Block - More realistic
Cobblestone Wall - More texture in the walls, like GundaharJS or UtopiaTp
ALL QUARTS - Like GundaharJS
Grey wool - Less grey, keep the cross frame.
White Wool - More variation on the wool
Sponge - Look like a crate or a box, maybe a cabinet for more decorations
Bedrock - Darker more defined
Spider Web - Smoke animated texture
Lilypad - More deatailed and more variation
Jukebox + Noteblock - Make them either shelving, cupboards, crates.
Crafting Table - Make it seem like a default crafting table with tools and other designs
Flowers - Lots of different colours and variation, may not be need from newest update (extra flowers)
Leashe - Darker rope
Redstone Lamp - Red light
Redstone Torch - Candle design
Anvil - Darker more metal look and colour
Ladder - Instead of nails holding the ladder, ropes.
Cactus - More vicsious looking, darker texture, more prickly.
Enchant table - Cloth on the table below floating book if possible.
Grey & White - No frames on the texture, make all colours same as wools.
Clay - Make the clay a little brown, so it's realistic.
TNT - Remove the creeper head, make the tnt realistic, somehow suited in a medieval theme.
Gold & Iron pressure plates - Make them a plate of food, round with like what seems to be chicken and vegetables, (Like WesterosCraft textures)
Sand - Add random skulls or bones in some blocks of sand (Not every block)
Redstone Block - similar to what you make other valuable blocks to look like
Minecart with tnt - Change tnt to what it looks like in the idea above
Horse Armour - Gold, Make it suit gold armour, for King's personal guard's horses. Diamond, Make it similar to elven armour.
Bucket - Make the bucket look old in style, probably wooden with iron frames on it
Book - Make it look old if possible
Splash potions - Make them different in design from normal potions, make the colours more defined so it's easier to differentiate the potions.

Diamond Armour - Make the colour whitish, suits elves more. Try and make it more elegant if possible.
Lava - Change it to a more Magma like look, so you can see it like it is molten rock
Stationary Lava - Same as above (Don't really know the difference, if it looks bad on stationary or the other just do it on one)
Gold Ore - Make the Ore more like it's actually gold, a golden brown colour rather than yellow
Chainmail Helmet - Archer's Hood
Chainmail Chestplate - Archer's Chest
Chainmail Leggings- Archer's Legs
Chainmail Boots- Archer's Boots
Like this: http://www.elfwood.com/~dogblessyou/Medieval-archer.2685099.html
Iron Helmet- Sellsword's Knight's Helmet, quite simple but good
Iron Chestplate-  Sellsword's Chest
Iron Leggings-  Sellsword's Legs
Iron Boots-  Sellsword's Boots
Like this: http://images4.wikia.nocookie.net/__cb20120323183602/gameofthrones/images/3/36/BronnPromoS2.jpg
THANKS IN ADVANCE!