The great people. You will not find geeks anywhere in the CECS department as friendly as the ones in ACM and ACM-W. I enjoy breaking Tony Pham's heart, getting my butt kicked by Joshua Liong in Star Fox, losing to Ben Chang in the card game, Bang, learning about health and tips on weight loss from Edgar Ortiz, and many more.
But who I will remember the most from ACM is Jesus (Jesse) Guzman. Jesus was the CECS mentor who instructed me and other students in the department. He was the one who convinced me to become a mentor, and let us just say that I would not have gone the same route it was not for him.
Jesus and others at ACM are some of the best people that I have worked and hung out with in the CECS department. I highly encourage students to be part of this wonderful organization. Remember, we have free lunch. :)