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.
Demonic Spiders - Therizinosaurs, or Therizinos, the outrageously powerful, pot-bellied dinos in the first game that roam in pairs and love to block narrow corridors. If you don't have any poison darts, get ready to see the inside of their stomachs many, many times.
Evil Is Sexy - He's a jerk, a murderer and a monster, but Dr. Kirk is also quite handsome.
Fanon Discontinuity - Dino Crisis 3, especially by those fans who were disgruntled that it never addressed the second game's cliffhanger.
Narm - Like many other Capcom games, the series voice acting can dip into So Bad, It's Good. "That's no lizard. That's a dinosaur."
Nightmare Retardant - The compsognathus hordes from the first game. It is implied that they are Zerg Rush enemies and Not So Harmless, but they are pitifully easy to defeat with the handgun and make a faintly amusing squeak each time one gets shot.
Sequelitis - As stated in Recycled IN SPACE on the main page, Dino Crisis 3 wasn't as well received as previous games partially due to the fact that the only connection it had to previous titles was that it had dinosaurs (of a sort) in it.
Squick - The bodies and bloodstains left around for the hero to find. While the onscreen animation is fairly dull, it's a particularly squicktastic idea to raid dead bodies for keys and Apocalyptic Log entries.
In the second game, corralling the compy that stole a keycard from you. It's not that hard once you know what to do, but the compy's tendency to sprint off in semi-random directions and Dylan's refusal to just shoot the stupid thing still grates on one's nerves.
Villain Decay - Because of the increasingly powerful guns you can get in Dino Crisis 2, dinosaurs (that in the previous game were unstoppable opponents who you could only run from) became pitiful bullet magnets who came at you in droves and were still harmless.