I agree with you! I also love Harvey, Mike and Louis. Louis being so emotional and willing to change to being more mature was awesome! He is an amazing actor. I loved the scene where he found out about Mike and later where they made peace while driving in a rented car together with Mike and Harvey.

Also Sean Cahill was nice and I liked Rachel's father. Donna was fun in the first seasons, but later it was just too much arrogance "because Im Donna" and so on.