Welcome! I know that exact feeling from both Minecraft and Dwarf Fortress, and that really made me want to go for it too. I figured there would be others like that out there
I've been working on making this game as extendable as possible since I found it (embedding Groovy, leaving hooks for easy plugins, etc), and am seeing an automatic plugin / server manager in the future, akin to what you're saying. Right now I'm overhauling the block definition system in a way I hope will eventually result in (among other things) a "block selection" screen for world gen allowing you to pick and choose, should you wish
A shorter term item that might be a neat first thing to try would be an options screen in the new GUI that allows changing (some of) the values in groovy/config/Default.groovy (and later that could set key bindings too) - are you set up on GitHub yet? Feel free to give the setup instructions at
http://wiki.movingblocks.net/Main/DevSetup and try and let me know if they can be improved