Leafeater's page

I'm facing a problem with a fellow player (who is also our group's "main" GM) interfering with the current adventure's GM.
Lets call this "main" GM, Alpha.)

Alpha is our group's "main" GM and the most senior in terms of age and time spend playing Pathfinder. He runs our group's main Serpent's Skull adventure and we play at his house.

Alpha is great as a GM, and we enjoy playing at his table. Early on, we decided that we would spend every other month or so playing some other Pathfinder Modules or homebrews, ran by the rest of us in the group. This is to allow Alpha to prepare the next section of adventure.

The problem starts when Alpha becomes a player. He takes on a very "commanding" role and makes a point to dictate what the party does.
This is far from normal, as we usually try to reach a consensus when options differ. With him, we need to make an effort to convince him otherwise, or he would just shoot us down or berate us for disagreeing with him.
This "problem" wasn't that bad at first, but as the months past, his commanding attitude is getting more prominent.

Recently, Alpha started interfering, rule lawyering or disagreeing with certain rules at the table. This reach the point where he even berates the current GM for certain actions that the GM made in the advanture. (Both in-combat and out.)

Alpha would criticize the amount of monsters send against the party, the decisions or actions of NPCs and Monsters, complain about the rest of us not supporting or healing him enough, questions why certain powers don't behave the way he thinks they should or just plain panic whenever a player drops.

He just don't seem to trust any of us to GM for him. And it shows.

What should/can I do as a player?
We are months into Serpent's Skull, and don't feel like leaving the group over this.
We also do love his GMing, and our playing location is his house, but his behavior is getting far from pleasant as a player...
... and it doesn't help that since he is older, we don't feel appropriate/able to tell him.

Help?

I am in a game where we just had a player join the party.
Problem is he seems set on roleplaying against other members of the party.

I can tell he is not really trying to make life miserable for the rest of us, it just that he ROLEPLAYS his character too much...
He does whatever he feels his character WILL DO, even if such actions are harmful to other party members.

For example, he will use bluff, steal from and use spells against other member of his own party. When asked why he does this, his reply is that he is roleplaying his character. As there are no evil party characters in our adventure, care to guess what his alignment is?

To make matters abut worse, I and the other member of the party are NG and due to the nature of our characters, we can't really "take actions" against his character for in-character reasons.

He seems a nice guy out of the game, but goes "in-character" during the game. When told about how some of this actions are not helping the party, he seems offended and insist that the action make logical sense and is "what his character will do". When questioned further, he starts saying that we are nitpicking on his character and goes on to defend his actions.

What can we do to convince him that his roleplaying is getting on the nerves of the other players? AND get him to understand it without going all defensive?