Tomb of Dracula is one of my personal favorites because I actually watched that in storyboarding class because my teacher thought it was fucking hilarious and worth watching on a work day.
Also, out of all the things they watched, Dog Days probably made me the maddest because I looked it up and realized that as bullshit moe dating sim adaption as that series looks, it's not based on a dating sim. We have officially come full-circle from dating sims being adapted into anime, we now have anime made to be adapted into dating sims.