I don't know if you're into spiderman or not, but the "Superior Spider-Man" series is possibly the best comic story I've ever read. It was genuinely the first comic series I've ever read that seriously made me want to keep reading it non-stop till the very end. Almost every issue had me in suspense. I'd definitely recommend it if you wanna read a fairly long story (about 31 issues long) that has a really good plot and great character depth.
This was the site a read it on: http://viewcomic.com/?s=Superior+Spider-Man use it if you want to as well (note: if you're veiwing it on mobile, the ads will redirect you sometimes) and I strongly recommend just reading issues 1-31 first.
Or if your looking for a simple, short, and cool story with interesting characters, I'd recommend "Doctor Strange #1 (2015)" as well as 2, 3, and 4 if you enjoyed it. I think Doctor Strange is an underrated character.