[quote=Rune_Alchemist]
went ahead and introduced the three NPCs, got a bit lengthy xPOkay, you're simply assuming those are the only Slytherin's that were ever famous. Sure none of the ones mentioned out there were 'famous' for potions, but its a big world.
[/quote]

that still is an assumption, in my opinion you can't really attribute any type of magic to a specific house with possibly the exception of Slytherin and dark magic, and Gryffindor and defense against the dark arts. i think any wizard and witch from all of the four houses can be great at any of the types of magic. I'm really glad that Merlin the most famous Slytherin aside from Salazar Slytherin was an expert in charms, it makes Isaak seem more realistic, also Merlin was follower of muggle rights so i guess not all Slytherins are ignorant