If you choose to watch the 20 minute video above it is pretty entertaining, personally favorites are the Pyro intro, and the Black Scottish Demolition man, who recognizes his own rarity, lol. The video above goes through all the character classes that are available in the game. The game play is very fast, and un-rewarding for beginners, for me at least, in the first 15 minutes I was ready to uninstall. But that is mostly because I hate to lose, and I was losing a lot, after switching to medic I started to find my groove, if I cant be a killer ill be a healer.
You really have to give this game a bit of time to get acclimated to the explosions and death surrounding you. I liked the game, after I found my niche and started playing with a friend, Cool game but will not have a permanent home on my hard drive.