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.
And then there's Kameo, who was already getting a reputation as a stealth Chessmasterbefore his antics in episode 17.
Best Known for the Fanservice: Check out this anime's fanart and videos. It's an almost guaranteed bet that H pictures of Fasalina or a clip of her sex scene from Episode 20 will be available.
Crowning Music of Awesome: The entire soundtrack can qualify, especially the opening theme. An even more epic example is the track "He reduces to Memories", which first plays when Van finally finds the Claw in episode 13.
More specifically, if you Google old reviews of the series from 2005 on, you can see that there's a lot of YMMV with regard to evaluating the quality of the series. Is it a lackluster and unimaginative rip-off of earlier and better anime like Trigun or Cowboy Bebop? Or does it draw elements from different sources and combine them in a compelling and creative way? On its 2010 re-release, various reviewers gave it ratings ranging from "C+" to "A-" or "Highly Recommended."
People calling it a Trigun ripoff have probably never watched more than the first episode, after which the cast encounter their very first major body of water, and then leave the desert entirely soon after and never return until the end.