Maybe...
this. I'd go in for more BM, of course, and I don't use MM, but this is for you, not me.
Now, to address the previous posts:
Quote:
BM isnt good for raiding.
and it will probably never be unless pets get such a huuuuuuuge buff that the whole world (non wow players included) will cry for a nerf.
Dump bestial swiftness, wasted talent point since a lot of pets already have dash/dive/charge.
Imp. Mend pet is not close to as good as Imp. Revive pet.
i'd rather be able to ress my pet in combat with half health instead of maybe removing curse/poison.
spirit bond is a really nice ability, and helped me out a large number of fights.
Catlike reflexes... whuuu dodge... nothing good for raid, party or PvP.
Not great for solo.
Ferocious Inspiration is a lot better, your pet attacks fater and has a higher crit chance then normal pets, so the buff procs rather often (especially with the speed buff it gives itself after a crit) and in the long fights in dungeons it helps out nicely.
Imp. concussive < hawk eye, effeciency, imp. arcane, rapid killing or monster/humanoid slaying (especially the last 1 for pvp)
and imp. mark doesnt help a lot in PvP/solo either, but is great in grouping.
edit: a raiding guild probably wont let you try BM out in a raid. they will ask/demand you to respec.
Beast Mastery is excellent in 5-10 man settings, still good in 15-20. Higher raids, however, give pets a very difficult time surviving.
Bestial Swiftness is a good talent to have, but unnecessary for raiding.
Improved Mend Pet and Improved Revive Pet are both great talents to have. If you're only going to get one, get Improved Revive -- this makes mid-combat reviving feasible and workable, and that can sometimes be the difference between saving the healer or wiping the raid.
Spirit Bond doesn't have good returns for the investment. You can safely bypass this talent.
Catlike Reflexes is an excellent talent to have, especially for any situation in which your pet is needed to off-tank. 9% dodge is nothing shabby, and 3% dodge on yourself is a nice bonus. The longer your pet lives, the longer it can protect the squishies. This talent is wonderful for solo, because that's an extra 9% that your pet is not being hit, which more or less means 9% less damage for you to heal.
Although I disagree on Aethien's breakdown, I wouldn't take Improved Concussive for a hybrid build. If you're going to raid, solo, and PvP, you don't want a talent that's solely for PvP. Instead, I'd pick up Efficiency in this case. If you want a stun, you have Intimidate. It's not a %chance to work. Use it.
Arthas, don't knock Improved Arcane. In this case, I would choose longevity over dps (Efficiency over Imp Arcane), but Arcane Shot is a high-power shot for a Beast Master. If your Arcane Shot does 500 damage, that'd equate to about 83 dps normally... but 100 dps with the IA talent.
Improved Mark is indeed a potent dps talent, not just in a group, but
anywhere that you use Hunter's Mark. This talent is not one to be discounted so readily.
I personally question the value of Aimed Shot in a BM-heavy build, particularly without its companion talent Mortal Shots. You may want to consider a spec that does not include Aimed Shot.