Once I was on Eldin Bridge with Marth in an online match and I killed myself with his Final Smash two times in a row. :p It's easier to use when you're on a stage with platforms and no walkoff edges.
Spectator can get on my nerves sometimes, when I bet on someone who does nothing but taunt all the time, or on a Captain Falcon yesterday who completely sucked and misses all of his attacks. :p Once I bet on a Dedede who only used his forward smash and even won the match
About the characters if you're counting Zero Suit Samus and Sheik as well, then the total is 37. You should have 35 squares on the select screen excluding random when you get them all.