I was happy to see a proper Han Solo after he basically just became a comedic sidekick in ROTJ. He's back in top form in this one, even if he's old now.
As for the new guys, I liked BB-8, Poe, Ren, and especially Rey who I thought was fantastic. She definitely has the ability to be the lead character going forward.
On the downside, Finn was annoying and I didn't like the villains outside of Ren at all.