As long as everyone relaxes and has fun with it instead of worrying about who's owning what guild where, I don't think competition will even be a problem. We're all here to have fun, and that should always be the bottom line.
If my suggestion to chill and let people do what they want is taken seriously(especially in regards to events), I can see guilds being less of an OOC group with mishmashes of people, to something more suited for IC specialization: a group of people can be in an assassin guild who regularly causes shenanigans for a rival paladin-esque guild.
It's things like that also make me believe that setting up on the same server would be a good idea, as long as everyone stops taking themselves so seriously OOC. There's a lot of squandered potential if everyone's spread too thin.
If my suggestion to chill and let people do what they want is taken seriously(especially in regards to events), I can see guilds being less of an OOC group with mishmashes of people, to something more suited for IC specialization: a group of people can be in an assassin guild who regularly causes shenanigans for a rival paladin-esque guild.
It's things like that also make me believe that setting up on the same server would be a good idea, as long as everyone stops taking themselves so seriously OOC. There's a lot of squandered potential if everyone's spread too thin.