Re: Help choosing a faction
Hi and welcome back 
You already got many good advices and if you already have some experience I'm sure you made up your mind.
My advice is to choose according to what you want to do, I mean some factions are easier because of the starting position and economy, but are less enjoyable due to limited army "options". It's up to you, if you want to build up economy mainly and turtle in some extension go for Elves or Dwarves, if you want more variety on the battlefield (and sooner!) go for Evil human factions or Rohan/Gondor.
I do love Dwarves and Elves, but I never finished 100% one of their campaigns, 'cause in the long therm I get bored of using always the same tactic on the battlefield.
Ciao
Flinn