Sometimes I get annoyed when there are laser weapons, but the exact nature of them changes depending on the situation. Sometimes they're incredibly accurate, sometimes they travel at the speed of light, other times they might as well be bullets because they exhibit none of the traits of a laser. It's not even really that I don't like lasers that aren't laser-like, but I don't like it when they can't decide.
Also, getting a little tired of strategists who are so clever they can predict the future. That just doesn't fucking happen. In Code Geass for example, Lelouche is generally just a really clever guy, but at one point, he predicts the exact course of a conversation and tapes his responses, timed perfectly. In contrast, I watched Mobile Suit Gundam 00, and the strategists there were done really well, visibly at the limits of their intellect all the time. You never felt like they were just completely in control or were doing things no human could possibly do.
Also technobabble, especially in Doctor Who, which really doesn't even try. I like my media to at least have some concrete idea of how things work, not just do whatever it wants and go "Oh, the time streams are out of sync and the chronological polarity was switched when they merged" or some shit.