The most HN relevant things that are awesome about EVE are how open the devs are with data. The developers have released their databases (Items, ships, stations, etc) which I have made some extremely handy apps with. The market is a ton of fun to play with an also has pretty easy to use APIs (Eve-Central). A lot of the files can be read extremely easily, and there is apparently talk of making market orders updateable via API in the future (This could mean full or partial automated trading).
With my ~4 month old character I've explored low-sec, played in worm holes, gotten into PvP fia FW, etc. There isn't much I haven't been able to do and I currently have more ISK (~2B) than I can really lose with the ships that I'm currently flying.