I bought a house!

MrGlass thought this was worth mentioning said
14

So, I just bought a house! Its big, way more space than we need considering were in a 1br apartment right now, but we got a good deal cause its used.

I'm looking for advice: Homeowners, what is your biggest regret for something you didn't buy/fix/take-care-of or otherwise do before moving in to your house? We already plan to replace all the flooring, paint the really bad walls, replace/upgrade the electrical systems (its fuses) & get a good cleaning service to scrub it all clean. Oh, and buying the first vacuum Meh puts on sale.

So, your advice? What am I missing? What crazy horror story do you have about home buying?