Dropbox

• This is an environment full of brilliant people; there is never a shortage of work-related insight or non-work-related interesting conversation.
• The culture is one of dedication to excellence--people truly care about creating a great product and providing a delightful experience for users.
• Building a real income-generating product, rather than being an ad-supported platform, is incredibly freeing. It feels great to be working on a product that we can provide to everyone for free, and that provides an experience good enough that some users are willing to pay for more space.
• "Work hard, play hard" is cliche, but an accurate description of Dropbox.
• The food is awesome.

With an environment focused on quickly creating a great product, there comes pressure. It's mostly not external--there's just a drive to be awesome that rubs off on you, and sometimes results in long hours.