Many people who have played the [i]Dragon Age[/i] franchise know that each [i]Dragon Age[/i] game coincides with one another, merging one games' choices into the next game you play, thus, those choices are reflected in the world you play in (much like with TellTale Games).
I've recently gotten [i]Dragon Age: Origins[/i], mainly because I wanted a more customized world for [i]Dragon Age: Inquisition[/i], and it made me think; is [i]Dragon Age: II[/i] all that important?
The most important things/choices in DA:2 is the gender and personality of your Hawke and if they sided with Mages or Templars. Beyond that, there is very little that is important to the 'history' of your 'world'. Even then, in DA:I, your Hawkes' personality isn't THAT well kept and a romance is only mentioned and the worst that happened (depending on your choice in DA2) is Varric disapproving of siding with either the Mages or Templars in DA:2.
Beyond that, there is little that really matters in DA:2 and, in my personal opinion, it doesn't matter for the history of your world for DA:I. That's what I think, anyways.
If I am missing something, please lemme know (as I didn't have a dragon age account to log my game choices when I got DA:2).
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I didn't get around to play Dragon Age 2 and didn't feel like I missed anything. I just read a summary of the plotline.