They say that "like attracts like," so if you want to meet someone who is well-groomed, articulate, and interesting you first need to make sure your profile is of the same caliber.
Post realistic but flattering photos, and write something about yourself that is intriguing and tells your suitors what you are passionate about and what makes you tick.
Self-taken photos reflected off the bathroom mirror with poor lighting and dirty towels in the background rarely make a good first impression.
A frightening number of profile photos can be found that are taken from bad angles, have frowns on faces, or are primarily of the user's pet dog, frog, or a pogo stick.
The more you have in common the more likely you are to connect on a deeper level.
Then watch how quickly other quality people who also put in the same type of effort are drawn to you!
I hear complaints from people all the time regarding the quality of users they're hearing from, or the fact that they're rarely hearing from anyone at all, and without fail, each time I have checked out that person's profile, it's a train wreck!
If the most important thing to you is being vegetarian, or a fitness freak, or Mormon, or into line dancing, then why not find a site that attracts others who have the same values?
And, yes, there's a niche site for just about everyone! This is a bold choice, but it can really pay off if you stick to it.