I am male and have worked in both. Here are some trends I saw, which of course all have their exceptions.

Advantages of mostly male workplaces

• People are less likely to be offended
• Straight forward communication
• People are quicker to feeling comfortable with each other
• People are quick to forgive each other

Disadvantages of mostly male workplaces

• Can be rough
• Can result in hypermasculinity and competitiveness
• More aggressive toward each other
• Less compassionate of weaknesses or setbacks
• Solutions to problems can be intense and aggressive

Advantages of mostly female workplaces

• More understanding of individual differences
• Solutions tend to be less harmful/aggressive
• Individual weaknesses are accepted and accommodated
• Setbacks due to unexpected circumstances are more tolerated

Disadvantages of mostly female workplaces

• Gossip and drama
• People can hold grudges for a long time
• Shady and deceptive interpersonal interactions
• People form cliques
• Indirect communication with double meaning
• Intentional misunderstanding to play power games