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.
Follow the Leader: To Princess Resurrection, indeed there are many similarities (male leads who're undead servants, female monsters join the household, group battling other monsters, chainsaw motif etc) but both series are original in their own right.
Memetic Mutation: Due to the many shots of a Dyson Air Multiplier in the series, many viewers claim to watch it for the fanservice.
Also, the length of the name of the series itself has lead quite a few people to refer to it as 'Korean Zombie Desk Car', in the same vein of Utawarerumono being called 'Underwater Ray Romano'.