I want a house with some containers or tables where you can drop all you gold ingots, precious stones and other pretty valuables. I mean literally drop on the ground or table, so you can see all this stuff shining around you. So far I bought Whterun, Solitude and Markarth houses, and they're unsuitable for this.

Wait for a modded palace/fortress/mega mansion/flying ship/floating castle/magical realm of Camelot for this.

The Arch-Mage quarters in College of Winterhold it's a real nice crib man, why don't you check it out?

SPOILER

Explore the area around Labrynthian... find the wooden mask by the skeleton of the guy who left a note explaining what's going on... put the mask on inside the barrow where you find it...

will that do? I have a very dragonlike store there... not really for ALL your loots... just the shiney ones you wanna see and admire without worry that someone else might also admire them or ask questions.

besides... heh. it's a cool spot.

hmm.....how about a jarls palace? just drop the coins one by one until the building is bursting with septims an then you can be like "heh, sorry this is just some loose change i had on me..."

either A. someone in the palace will hand you the things you're dropping and tell you to be more careful with your belongings...

or worse... B. someone will pick it up and say something to the effect of "lucky for me this was just laying about."

I am mildly dissatisfied you cannot drop gold coins in the console version

News flash!
Not everyone is playing on pc!

Ont: Maybe Hjerim in Windhelm?

After you complete the Dark Brotherhood questline you can use the Dawnstar Sanctuary as your home, I think that comes closest to a sort of castle or palace. At least I think it's the biggest 'home' in Skyrim, and it comes equiped with a bunch of followers, an alchemy garden and torture chambers.