There are social obligations and there are personal expectations.
All people at the table should perceive and play the same game. If, for example, we´re off dungeon crawling, all characters should be up to it. If we´re having heavy roleplay and deep plots, there shouldn´t be min-maxed fighting characters, and so on.
But oftentimes, what one personally perceives as a weak character may well be fun for the other player/players.
The line will draw itself naturally at the table.
All people at the table should perceive and play the same game. If, for example, we´re off dungeon crawling, all characters should be up to it. If we´re having heavy roleplay and deep plots, there shouldn´t be min-maxed fighting characters, and so on.
But oftentimes, what one personally perceives as a weak character may well be fun for the other player/players.
The line will draw itself naturally at the table.