I usually don't like anime at all (there's always way too much exposition and a focus on talking heads rather than visual storytelling), but OPM is entertaining me so far. Though I have to say, with the exception of the montage of the hero tests and the fight between OPM amd Genos, episode five is probably the weakest so far. There's a lot of unnecessary exposition they could've cut out and replaced with visual cues instead (such as ommitting the board meeting scene and instead just having the phone call between a suit and the blue-haired dude while holding a picture of Genos).
Anyways, I still find it really entertaining and now that the characters have been fairly well established I like that the show is moving towards a greater plot.