Retirement Savings question

There are plenty of threads on this topic but i need a quick answer, i don't want to scroll through pages and pages.

I left my old company and i have some money saved up in my 401k, i'm fully vested in all the money in there.
Question: Should i roll into IRA? Roth IRA?
or
Should i roll into my new jobs 401K? (this is highly unlikely)

Thanks

Retirement Savings question