Sam Fielder: It's a tough call between Yenser and Likens. They both are hilarious on twitter and I love their interactions and genuine sense of excitement and enthusiasm for all things Cal. They also both seem like really well-rounded guys and understand that there is more to life than just football, which I like too. So flip a coin on those two but they're easily my favorites. (Since I submitted this answer Yenser has bullied his way to the top by recommending Spitz sunflower seeds to me on twitter. So I'll stick with my original answer but Yesner is really my pick...)
Leland Wong: Based on his Mic'd Up segment, I really like the fact that defensive backs coach Greg Burns is clear and commanding in instructing the players on what to do, but on the flip side, isn't afraid to be loud and proud in commending the players for doing something right.
That being said, I can't help but love the bromance between running backs coach Pierre Ingram, offensive line coach Zach Yenser, and outside receivers coach Rob Likens. I'd love to be a fly on the wall of an In-N-Out and listen to these guys shoot the poop.
Avinash Kunnath: Rob Likens. Not only is he a great guy and an outstanding receivers coach, you will see playing time if you excel. Maurice Harris, James Grisom, Jackson Bouza, Darius Powe--all of those second or third-string guys managed some impressive plays at some point last year.
As for the tiebreaker with him and Zach Yenser; I think Zach would ask me to gain 150 pounds. Deal-breaker.
Nam Le: I can't decide between Rob Likens (who is just fun and tells great anecdotes about recruiting) or Zach Yenser (who reaches out to have lunch with dorks like me), who are easily the most entertaining guys on social media by far. Let's just get them both a television show. Rob and Yenser in the Morning. Tell me you wouldn't watch that.