Yes and no... I find the notion to bring up marriage as a first impression, since a profile is nothing more than that, a bit weird. But then again; I've found that marriage rates aren't that high at these parts in the world anyway. Heck, there's even one site I've got a profile and I explicitly state, since it's an option I could select, that I'm up for a relationship but I'm not interested in moving in together. Commonly known as an LAT (living apart together) relationship. That should give people an impression. But yeah, the notion that one should get into details of marriage when dating isn't even happened seems a bit crazy to me. With all the women I've dated, no one ever... brought up the notion of marriage.... well, one did, and that was cause we were attending my friends wedding... and she told me how silly she found the concept of marriage. So even after dating and being together for years, no one ever thought about dating... I guess I meet the right people then
Looking for a good time has such a bad connotation. To me it sounds a lot like a one night stand.. and that's actually something I explicitly mention in that I'm not interested in that at all. I'm looking for something long term, but along with that I expect someone to actually sit through read my profile and identify with stuff that's on there.. and if that's cool, fine, contact me and we'll see if we connect on a personal level. But in a way you're right, I'm looking for a good time, hopefully at least the next few years.
On that topic; you'd be surprised about the amount of women I ran into on OkCupid with these compatibility questions who actually answered the question "how long do you want your next relationship to last?" with "for a few years"... in fact most people apparently aren't looking for a lifetime commitment anymore as it seems!
Perhaps your and my idea of dating and finding someone to spend "some" (take that how you will) time with greatly varies.