Well, we too, are very blessed. We are young, but dh makes a good amount of money and we are comfortable. I'd say we make just about "enough and a little bit more". We never have to
really worry about money, and we are able to save and invest (what I'd consider) a significant amount every month. We are not comfortable enough to be able to buy here (we'd have to pay at least 550 k to get into something I'd even consider in this area), but we are moving away in two years anyways (at which point we will hopefully have met our saving goal for a down payment).
We don't have a ton of money, but we have enough not to worry, and enough to feel optimistic about reaching our near-future goals.
I'll say about 5500-6000 a month is "enough and a little bit more" for my area, if you're okay with not being able to buy (which we are, for now.) It's not as much as many, many people have around here, but then again, those people have a lot more than "enough and a little bit more".

Also, I agree with previous posters who mentioned cost of living as being a HUGE factor in this. We'd need a lot less to be comfortable living in a lot of other places.
Edited: Just wanted to add that I think "enough" has different connotations for everyone. Does it mean you have enough to just cover food and bills or does it mean you have enough for food, bills, vacations, big house, shopping sprees, etc.? Just a thought. Everyone probably interprets the word differently, and I'm sure for a lot of people, not having enough to be able to buy a house would mean just plain not having enough, while for us, we still feel like despite that, we have enough. I'm half tempted to edit my answer so that "enough" includes room for a pricey mortgage in my neck of the woods, but I guess I'll stick with my original, since to me, that seems like enough. (Sorry so wordy, it's late. May have to come back in and edit this tomorrow when I'm more awake.)