I'm using my raspberry pi as a webserver and a hacking tool, I use my raspberry pi hacking tool to test some things I learn, instead of try it in real websites, I try it on raspberry pi. There are many things you could do, I'm young and I'm just starting so I'll wait for more serious things.
I'm using raspbian and I connect to raspberry pi via SSH so I don't make use of raspbian GUI, I use lighttpd to open port 80 and share website in my home network.
By the way if you get any project or question that I could help, PM me, I'm here to help everyone if It's possible to me.
Feel free to PM me since I arrived here i didn't meet anyone.
Sorry my english, i'm not from english speaking country.