Nah, I do that all the time. Sometimes it's just not worth it. If one trophy is gonna take me another 10+ hours in a game that I didn't really enjoy too much, screw it. Unless you are one of those walking robots with a 99% completion percentage, no need to suffer imo. Even if you are one of those robots, and you don't think you want to do it, save your time and go play something else you will enjoy. Trophies are really only for your personal enjoyment, most trophy hunters don't care about other people's numbers, let alone completion percentages. If you one of those guys that are gonna have a panic attack if don't get every trophy, then yeah I guess it's bad. If not, no biggie.