I'm passing out at the computer, but in an effort to be concise, but not vague.
Dark Souls 2 is the easiest of the series, and in that sense it can be seen as good training wheels for the trilogy ... sort of. It also doesn't prep a new player properly, so if you play the main game, fine, but then you hit the DLC and suddenly the difficult spikes from a 4 to a 9, whereas if you play Dark Souls, yeah, it starts at maybe a 7, which is harder to crack into, but it doesn't feel so bad when it lifts to an 8 or 9.
The story of the three games is so suggestive rather than overt that you can play them in whatever order, though 3 will have more "whoa" moments if you've played the first one. A lot of the story fun is reading between the lines. Dark Souls 2 wasn't too interested in that way of doing things and doesn't have much story the first half, then lots of story the second half, and it's all told pretty plainly rather than as clues to a bigger idea. But that's personal taste and lots of people don't even care about the story.
My real problem with Dark Souls 2 is that it has the laziest area design of any of the Soulsborne games. Many areas are just a blob of space with enemies dotted all over. Areas with slightly tighter design just fill in enemies where there's some empty space. Compare this to any of the other games, even Demon's Souls, and what you mostly get are sets of encounters. Not that the other games don't have points of design weakness (the Chaos areas of Dark Souls, for example), but 2 seems to make design weakness the point, and unfortunately it hurts the flow of the game when compared to the others.
That said, if you play Dark Souls 2 before the others, that's probably the way to see it in its best possible light when there aren't other games in the series against which to compare Dark Souls 2's "feeding corn to the chickens" approach to scattering items and enemies. And though the areas aren't well-designed, they are varied and many of them are pretty. It has my favorite hub zone of any of the games, which bums me out that I don't enjoy the game around Majula as much as Majula itself.[DOUBLEPOST=1518066508,1518066474][/DOUBLEPOST]That wasn't concise at all.
And those posts were almost a week ago. I need to go to bed! Weeeeeeeeeee