[Udo]

I think my ideal office space would have both - little separate rooms for one person or, depending on preference and necessity, a small group. And then there'd be large and quirky open areas where people could go and sit down with their laptops randomly.

Because I have experienced both extremes (including my own startup) and they're not ideal. Having your own office is nice, but sometimes you want to ad-hoc with a small group of other people, or maybe you just want a quick change of scenery, maybe go to a place where there is some background activity. You shouldn't have to go find a Starbucks for that.

For me, these laptop-only environments don't work very well either, because at some point I want to have my desktop with a decent multi-screen setup.

Lastly, there should always be the option of working from home when appropriate.

So, if I ever start a company again, I'd try to just keep all these options available and let people find the right balance that works for them individually.