These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Hatedom: In some corners of the internet, Sentai is eponymous to They Just Didn't Care. Lazy dubbing with no-name off-the-street actors; unable to make translations when the English is literally on the video; obnoxious blurbs on the covers of their licenses that degenerate works into pure Fanservice; allegations of shipping out blank discs. There are people that would rather pay $300+ on imported BDs than $50 for Sentai's. Thankfully, they do leave Japanese audio as a second track, usually with official subtitles.
Memetic Mutation: #SentaiNoticedMe Explanation Pun from "Sempai noticed me." Sentai Filmworks is one of the most interactive anime licensing companies in North America in the internet social media where they reply to the fans' Facebook and Twitter posts as well as favoriting and retweeting the said posts. If your tweets or Facebook post is favorited, it's relatively common to reply with #sentainoticedme immediately when noticed.