In my absolutely not very humble opinion; unless it's statistically broken (i.e. usually comes from some third party splatbook or a different version of the game), no DM should ban playable material unless they're doing the legwork to actually create their own world in which that thing doesn't fit. Make it make sense. If you're just gonna tell me I can't play a hill dwarf in Dragonlance just because you don't like dwarves, I'm gonna tell you to fuck all the way off to Fuckoffton, on the east side of Fuckachusettes.
Pretty sure he was being hyperbolic, but I will say "this creature gives me an arachnid reaction and parsing out its cursed geometry makes me nauseous" is a fair reason. I mean, I allow anything as long as I, myself, have access to it to parse out if it fits in the game world. Don't show up with your Cylon homebrew, but can we shove that into a warforged or autognome chassis so we know it's been properly playtested? (He's currently in a campaign with a walking jello mold, a dwarf covered in spores, a dandy aasimar, a catfolk cleric, an orc bard, and a Human Ranger (TM) named Tom.
The upside these days though is that it's not 1989 and if you hate a DM's style, it's not like the old days when it was like "well shit, this asshole's the only one willing to DM within 48 miles, it's this or nothin'." And there's enough players hunting for a table to join that the DM be like, hey cool, that frees up a spot for my wait list, you'll probably be happier at a different table.
Staying on topic, though - while Monster Force scales perfectly for what I want it to hang with (Classified) I wish Dracula was maybe a quarter inch taller, because I have him on my desk next to Marvel Legends Dracula and I kinda of want him to look him in the eye and question Legends' Dracula's sartorial choices. "Why are you wearing a lobster? What happened in your timeline to shame me so?"
