Boundaries are very important to me.
What do I think they are? The defining line from being an amazing person, and being an insensitive, cruel, hard ass. (Ffrom the view of the person who's boundaries have been crossed.) They are the line where the person decides "this is how far I am going to let someone into my life, trespass over my stuff, or essentially, interact with me."
I am greatly respective of boundaries, an I hold the upmost respect for those who hold my boundaries, and I take great displeasure in interacting with people who don't respect boundaries. It's highly offensive, and just rude.
I always say, that the more defined the boundary, the healthier it is. And that's that.
I have thought about boundaries a lot, especially as a gay man. I am also valued by many straight friends, because I respect everyone's boundaries; so I don't try to turn them gay, even if (especially if) I am attracted to them.
And to be honest, I acctually this topoic relates very well to MBTI. I am not well versed enough to explain which type is which in the boundary mine field, but some types are exceptionally good at boundaries, while some are exceptionally bad... *cough* *cough*
But when it all boils down to it, it depends on the relationship, rather than the population. It's like asking (because this is how I see it) "is there enough affection shown in relationships nowadays?"
Following boundaries, especially ones for personal, and emotional space, is one of the deepest ways I not only show someone I care,but how I get it back from them. Needless to say, I am absolutely horrified when I cross a huge boundary that in retrospect was very clear to me, but at the time was not.