You should I personally enjoyed them all.
Origins is an epic quest style journey.. you save the world. It's basically like watching an epic film like lord of the rings.
Da2, while some things bug me like the waves of combat, the NPC interaction is one of the best of any RPG i've ever played. It also has 2 great DLC's, one is the lead up to DA:I the other has felicity day as the lead and it's pretty fantastic. Sure some areas are reused but no worse than Mass effect 1, It also is the only one that takes place over 10 years which really adds something to the game. Most RPG's don't put use time like this one did and it was pretty effective. takes place in one city and has a pretty interesting story.
DA:I, It is rather unique as it also has a bit of sandbox to it, but if you sorta pick and choose what you wanna do, aka not trying to do everything and sorta follow the main story the game moves along and is really well done. If you try to do everything in one play it can really drag. That said the NPC's are great so a replay trying different classes, using one of 4 voices, 2 male and 2 female, and different party make ups can really make this game shine. for instance a Varrick, Cassandra, Dorian and you a two handed with male, Or a elf bow female with solas, blackwell and iron bull, Or a Fighter with Vivvian, Sera and cole.. Though you could also add swap cole for sera, her banter with vivian and blackwell is great
Another save the world kinda thing but it's really cool seeing all the areas of thedas.
My point, Give um a run, they all have there upsides and flaws but all are very solid games.