level 2 or 3 seem nice so people can multiclass if they want, level ones nice so you get a more evolved feel (but much easily available death on a stick), level 4 or 5 puts you above the average schmoes (gaurds and soldiers are level 1,2,3 fighters/barabrians/rogues no warriors here, (hee hee that looked like level 123 multiclassed barbarianfighterrogues before the commas and slashes, anyway)..... we did start a short lived campaign last easter at level 8? might have been higher even, that was fun, means we had a chance to fight weird and wonderful creatures be saviors of mankind (actually lizardman kind for me) and all sorts of stuff.
hmmmm as for the favourite. not a clue. I would have said 2 or 3 as thats what i started the campaign I'm running at so people could multiclass from the start if they wanted. But remembering the high level crazy play that was great as well.
Have fun anyway, I'm sure you will.