[The Bread Winner]&[Justly Rewarded](Basically impossible)
-Yes, would take forever.
[One Hump or Two?](difficult)
-Not possible.
[Damage Control](difficult)
-Difficult, without an AB premade that doesn't cap any nodes.
[The Defiler] (soon)
-Easy, just time consuming.
[25 Exalted Reputations]
[Guardian of Cenarius]&[Chief Exalted Officer]
-Lofi did it, as did a couple other F2P.
[30 Exalted Reputations]
[Twenty-Five Tabards]
[1000 Quests Completed](Afte basically impossible)
-Not possible.
[2500 Daily Quests Complete](Long time)
[Lil' Game Hunter] (75,100,125 basically impossible)
[Tuskarrmageddon](Very Verydifficult)
-A level 39, also on a Chinese server, did do this one and got the epic rod.
[Tricks and Treats of the Cataclysm](It seem cannot be completed)
-Only possible for alliance due to phasing.
[Got My Mind On My Money](5000G,10000G,25000G,50000G and 100000G Verydifficult )
-Yes, time consuming.
[The Captain's Booty](soon)
[Greedy]&[Needy](Verydifficult)
-Several lowbies have this from Northrend and Cat rares.
[Dead Man's Party](Chinese serverid don't have this festival
Brewfest related achievements(Chinese serverid not open F2P last year Brewfest .)
[Ethereum Prison Key] is a good thing
-Infernal Ambassadors.
-100k and 250k HKs.
-Archaeology rares.
Most of the achievements you have, that US/EU don't have are because they are restricted to BC content. Your character is full Cat. Check out some of the 19s with 4k achieves to see what's possible for those dedicated enough. That said, now that achievements are linked, most people don't bother. Of course you can still restrict a character's achievements to only display personal ones, not linked if you like.