I always love it when a sci-fi creation actually looks realistic and practical. This group of robot assassins by Devid VII is a great example of military sci-fi realism, with lots of functional-looking greebles and a very aggressive, utilitarian look. The drone in front makes great use of minifigure parts, such as using legs as a major part of the arms. Devid says that there are more robots coming in this series, and I can't wait to see them.
This looks like a screen grab from a cool game or movie. I don't know what these drones by Legohaulic are up to, but one of them looks like it'a about to be ambushed. I love that these have a similar construction style but through color choice and detailing they're both unique.