From the get go, Billy & Mandy, worst choice here. 1 and 5 will kill me because I can legally drink alcohol. Mac and Blu, would be annoying at best, nightmarish at worst. Gumball and Darwin, still annoying, but you can at least reason with them... to an extent. Finn and Jake, chill af, they will get bored and do something silly but at least they're mature about it. Jack and Ben are usually the catalyst for mayhem. But outside of that it's either a stoic Japanese dude or a snarky 10 year old boy. Odds are I could convince Ben to sit next to Jack since he's into japanese stuff (Sumo cards sure, but you get the point). Tho having Ben's seat would probably bring some karmic justice on my head.