re: How much of an emergency fund do I really need?

I'm in your exact same situation. While I've yet to start a Roth IRA, I plan to max out my 401 as quick as I can in June. After that my plan is to just put as much away in my savings as I can for the next year-ish and hopefully build up enough cash to get out and buy my own place.

I keep flirting with the stock market but at this point it's all about getting out of your parents house. I'd focus on that first and foremost.