[quote name='FriskyTanuki']I know how to make stone, but that doesn't mean it's not annoying to make mistakes with it and have to do the same process all over again.[/QUOTE]
Make it out of sandstone. Not only would that be like 10x cooler looking, you can break it back up with no problem (as you know). But I think a sandstone castle would look pretty damn nice. I restarted my game and got a world with a fair amount of desert and normal areas, and a few big mountains. I had a mountain with an overhang at the top and built my house up there almost entirely with glass. I was thinking of making a pyramid in the valley below next and maybe putting a treasure room in there

.
This world also had some jack-o-lanterns so those are decorating my house. I wish you could move the cactus and replant them but I think all they are used for is to make green dye.
I have to figure out the planting/harvesting part but I'm nowhere near water and I think you need to plant near that right? I do have some seeds I got from who knows where.
[quote name='GizmoGC']so after you build a house...what else can you do by yourself?
I heard there are treasures and such, but so far all I've done (for 5 hours...) is make a pretty complex house in a mountain.
Never played this game before![/QUOTE]
Yeah, what you might want to do is build a mine shaft from the inside of your house (or just outside). Just stair-step it down at 45 degrees until you hit a cavern or just find iron, diamonds, lapis lazuli, etc... That is what I was going to do tonight. My son helped me make a bunch of obsidian and now I need a diamond pickaxe to harvest it.
I was also thinking of doing the lava thing around the side of my house. My son managed to do it in his game tonight without setting anything on fire except a few trees.
[quote name='FriskyTanuki']I don't know how widely known this is, but if you press in the right analog stick, you'll go into stealth mode that will keep you from falling off of edges. So if you're doing elaborate builds and keep falling off, that will be a big help along with letting you hang off of the edge a bit to help expand platforms more easily than you could without using it.[/QUOTE]
Yeah, this is one of those things my son showed me. He is a fountain of knowledge about this game. He has been playing the PC version for a while. Not that this exact mechanic would be in that - but he reads alot about the game too so he knew about it.