BSF
Explorer
The onus for maintaining balance is in the GM's hands. However, the players should certainly contribute where they can. As a GM, I do everything I can to assure that nobody's character significantly out performs any other. I even try to give each character the spotlight to help the players that are less aggressive. I try to make sure that everyone is having fun and one of the strategies to doing that is to make sure nobody feels like their character is "useless". It is much easier for me to do that when a player can look at something in a book and determine for themselves that it is unbalanced.
It is also nice when each player can look around the table and decide that they should sit back for a little bit and let somebody else have the spotlight. This doesn't always occur, so I need to take the focus off that player/character to give somebody else opportunities.
That is part of what GM'ing is about. So, much of the responsibility rests with the GM. But, the players can, and should, help that process because everyone is at the table to have fun.
It is also nice when each player can look around the table and decide that they should sit back for a little bit and let somebody else have the spotlight. This doesn't always occur, so I need to take the focus off that player/character to give somebody else opportunities.
That is part of what GM'ing is about. So, much of the responsibility rests with the GM. But, the players can, and should, help that process because everyone is at the table to have fun.