Pssh I'm a sucker for our Darth Lord of the Sith and savior all day, every day. Though it's one of those instances where it's usually an agreeable opinion, unless you're one of the few who think Vader sucks or is overrated. Not gonna lie, I enjoyed Vader in Rebels more than in Rogue One, which is ironic because the ending scene was just...so good. Rebel Soldier: "Help us!" If nothing else, it's probably because of the different stories being told. Original Trilogy will always be the best, though.
Obi-Wan is to-be-determined, since we've yet to see how this story ends, but I kind of like what we've seen so far, even though there are some negatives here and there. But hey, even as a diehard fan of Revenge of the Sith, there is..."NOOOOO!"
Bottom line: I'm a sucker for Darth Vader.