Quote from Dewydbb
An airship fortress.
Eh. If I do anything that floats. It will most slikely be a floating chain of islands.
Quote from Konstiin
Depends on if you're looking for a whole new foundation or just other building ideas.
If you're looking for a whole new idea, try building something out in the middle of the ocean. Either above or under the water. Underwater bases can present a fun challenge in survival.
Or you could try building something on a floating island in the sky. This can also be a fun challenge, although this might be difficult to reach quickly.
Quote from Rayvolution
(Disclaimer: If you already know how to draw textures most of this post won't be too handy)
My advice would be to start off by ripping off someone else work. I know, it sounds crazy. But if you're completely new to drawing textures your best starting point is to find someone else work that's similar to a style you're interested in, and rip it to shreds. Try to figure out how they made it and then try to make textures that would blend right into that person's work like it belongs there. Once you've mastered the art of replicating someone else (Completely from scratch, no texture edits!) Do it again! Find another pack you like, and try to duplicate their style as well.
Once you've done this to a bunch of packs, then take all that you've learned and try to make up your own unique style. It's how I learned to draw textures many many years ago, long before MC. There's a lot of subtle things you pickup. Drawing textures isn't really the same as say, web graphics design.
Just keep in mind, you absolutely should not try to distribute these ripoff textures, people will probably notice pretty quick. Just use them for learning purposes only. Another obvious route is to find tutorials based on the styles you like (Cartoony, pixel art, realistic, etc) and try to duplicate their work as well.
Somewhere along the line in the learning process your inspiration will some naturally! Then, once you really get going and have your own style, post some examples in this forum and let us nitpick them apart, and we can all help you figure out out to shade and color your pack correctly.