...there isn't going to be a very deep main story...
I'm all for side quests and being able to go anywhere etc. But if that's the case I'm going to be severely disappointed. Even though I've been enjoying Divine Divinity (I'm playing it for the first time now and it's how I found out about DOS) I'm finding it's shortcoming is that the main storyline is almost a footnote in the huge vast world they've created. I was really hoping for the main storyline in DOS to be something worth remembering.
It's so hard to find exactly what I want in an RPG. Can't I have my sweeping 70 hour epic main storyline like those found in some old school JRPG's yet have the freedom and side quests found in western RPG's? Evidently no I cannot. When I want open ended side quests I have to go with western RPG's and when I want sweeping main storyline epics I have to go with JRPG's.
/sigh
Yes, yes, I know there are some exceptions, I can name a few on one hand as well but for the most part they tend to follow the rule.