Despite being a standard harem show at heart, surprisingly serious character arcs and lots of (often funny) stuff going on in the backgrounds.
Date a Live is funny mostly because of how commited it is to its jokes. They really hammer them home, which might not be elegant, but it sure is effective.
An example by comparison:
Normal, weak romcom: Protagonist juggles 2 dates simultaneously
Date a Live, not fucking around: Add a third with a bloodthirsty monster who eats people and then juggle them nonstop for over 5 hours
And everyone is deadpan serious about the protagonist seducing spirits with no knowledge, training or gear, while they themselves engage them with full military equipment, airships, tanks, the works.
While feeding him conversation options like in a dating sim, but all the options are terrible. It's comedy gold. Watch it if you have any kind of tolerance for the genre.
tl,dr: Literally "make love not war" by way of harem comedy.
Explanation by Varaxis on Sunday, 20.10.2013 15:57
Explanation by cake-kun on Wednesday, 31.07.2013 04:02
Only difference would be that MC in KamiNomi can be seen as an ass (not heartless, of course...) But they also do share huge similarity (notably, fact that they both wants to protect all the girls they shared emotions with)
Explanation by neoninja68 on Wednesday, 10.04.2013 02:16