how many times did you change real estate agents?

I'm on my second one and he's wonderful! 
But my first agent was so highly recommended, but a total nightmare!!! To the point of asking me to sign sale papers without even discussing with my FH!!!
I think we are in good hands now, but a friend stated she changed agents over 4 times... it's been a nightmare and I'm scared we took too long and may have lost the house we wanted most! 
Anyone else have these issues?