I had a game that went on for about a year, probably 30-40 sessions. we met almost every week.
We started at Level 1, and We were restricted in no way by race, class, gender, etc. But, not haing access to terribly many errata books, I decided I wanted to play a Gnoll barbarian. Now, our GM was pretty cool, and gave us all a piece of gear that went with our backstories. I crafted an interesting and detailed backstory about my life up to the point i was captured, and placed into some arena games. I described the arena games and the changes they had wrought upon my gnoll, Vekk, in his formative years, and I always roleplayed him true to that gruff " I kill you first" Mindset.
Five sessions in we've all gotten along pretty well, done the prerequisite meet and greet, slayed some kobolds, gotten some dollars and are now embroiled int a little bit of plot, suitable for 3rd level characters. We're in the basement/sewer of some nobleman's mansion, searching for clues to a necromantic cult. By this time I'd gotten used to the rest of the party, in character, and was starting to look at them as less like food and more like actual companions. Like a pack. And this is where shit started to sour.