Im not going to cover all rogue specs and this post will not be well thought out because i have a raid in a few minutes. I will come back and fix the post when I get a chance with links and maybe some better grammar.
17/0/44 \\ 7/12/42< shadowstep 7/12/42 from Ranzwick
Use maces swords or fists and get hemo and this spec is fun though. I wouldn't say its the best spec it allows advantages against some classes that rogues are normally at a disadvantage against such as warriors hunters mages and warlocks. Why? shadowstep you can use it to get behind your opponent in opportune situations. Say you are fighting a warrior, when you back out he will switch to berserker to intercept and you can shadow step right as he intercepts and end up where he was and he where you were(requires practice). Against mages warlocks and hunters you can avoid kiting, and vs warlocks and mages (any casting class really) you can shadow step behind them right before their cast goes off and avoid some damage.
30/0/31 HEMO Don't mistake this for your average dagger build. Mutilate build
Again I don't have a ton of experience with this with good daggers. save up some energy after you get 5 points and then kidney shot and hit them hard with mutilate. This build will hit hard with strong daggers
Builds combo points very fast and allows you to get improved kidney shot and quick recovery if you hav ea healer on your team in arenas. Its all about hitting HARD and stunlocking. 2.3 makes this spec awesome. Probably my favorite spec currently
0/31/30 adrenaline/prep hemo
You can choose any specialization you want i jus tput maces. This spec is all about constant adrenaline rush with the utility of hemo and preparation giving you 2 blinds. I don't have any experience with the build.
41/20/0 \\ 41/0/20 41/20/0 from Ranzwick
Mutilate build
updates soon