1. The Needy Guy

He is overly emotional and shares all his feelings with her right away. The Needy Guy also doubts himself and needs constant reassurance about his relationship, work and friendships.

Why he is so unappealing: Confidence and independence are very sexy traits in a man -- insecurity and dependence are not. Most women look for a strong partner they can lean on. So if you are always leaning on her -- especially in the early stages of a relationship -- she might doubt your ability to do this. And since women tend to come into relationships with all sorts of insecurities, she won't want to deal with yours as well as her own.

What to do if you're that guy: Timing is everything, so you just need to keep your feelings in check at the beginning of the relationship. Try to hold off on sharing all your feelings or divulging your insecurities. Once you are far enough along in the relationship, you can share as much as you want. By that point, she'll appreciate knowing what's on your mind.

2. The Predictable Guy
Women don't like the Predictable Guy because they know exactly how he'll react to everything. He follows formulas and never wants to do anything differently. For example, he'd never surprise a woman by spontaneously taking her out for the night.

Why he is so unappealing: Women look for a certain amount of unpredictability in a man -- they want a free spirit. This is why some women seem to be drawn to the notorious "bad boy." It's not that they are drawn to his badness exactly, but rather to his unpredictability.

3. The Arrogant Guy

He has a huge ego and he's condescending. He is also rude -- not necessarily to her, but to anyone he perceives as beneath him. And that's just as bad as being rude directly to her.

Why he is so unappealing: A woman often looks at how a man treats other people to assess his personality. So even though you might be nice to her on a date, she'll be paying attention to how you act with other people too.

What to do if you're that guy: No woman wants to be talked down to, so I shouldn't have to tell you to shed the ego when you are dealing with her directly. But in order to really impress her, you need to treat everyone around you with a certain amount of respect -- because she'll be watching.

4. The Boorish Guy
The Boorish Guy doesn't try to hide the fact that he's checking out other women while in her presence; he flirts with the waitress and he even goes as far as to brag about his past conquests. Overall, he lacks respect for women.

Why he is so unappealing: Not only is this type of behavior infuriating, it can also be bad for a woman's self-esteem. If you act like this when you are first getting to know a woman, you won't stand a chance.

What to do if you're that guy: If you can't curb this kind of behavior permanently, then you at least have to keep it in check when making a first impression. Keep your flirting and wandering eyes at bay -- and maybe eventually it'll become a habit. Because, truthfully, if you introduce this kind of behavior into a relationship at any point, she won't be pleased.

5. The Cheap Guy

He invites a woman to dinner and then subtly suggests they go Dutch. He never splurges to buy her flowers and he always opts for the cheapest wine. He makes her feel like they're on a tight budget from the very first date.

Why he is so unappealing: Your first few dates should always be carefree; the words "saving" and "budget" shouldn't come up. If she spends the first date picturing a lifetime of penny-pinching with you, you're out of luck.

What to do if you're that guy: Loosen up the purse strings a little when you're courting a woman. You don't need to spend a fortune to make a good impression, but you do need to make her feel like she's special. Flowers are a nice touch once in a while.

6. The Arguer

This type of guy turns every conversation into an argument. When he takes a woman out, he makes her feel like she's in debate class rather than on a date. And in doing so, he makes her feel defensive and self-conscious.

Why he is so unappealing: A date should be a pleasant experience, but if she's on the defensive the whole time, she will not be enjoying herself. Remember this: Constant arguing and debating is a stress -- and you certainly don't want her to associate you with a stressful experience.

What to do if you're that guy: Most importantly, relax. If you are this type of guy, you probably revert to debating because you are nervous or unsure of what to say. So before the date, brainstorm conversation topics and questions you can ask her. That way, you won't be as likely to revert to arguing during lulls in the conversation.

7. The Self-Righteous Guy

This guy is very judgmental of others. He probably doesn't drink or smoke, and he doesn't hesitate to tell others to follow suit. From the very first date, he'll preach to a woman, telling her she shouldn't drink wine or get dessert.

Why he is so unappealing: No one wants to be judged, especially on a date. She'll just find it annoying and rude.

What to do if you're that guy: You can preach a little once you are actually in a relationship. But until that point, her drinking, smoking and dessert-eating habits are none of your business.

8. The Misogynist

This guy makes no secret of his bitterness toward women. On a date, he can't help but exude negativity toward his companion and the entire female gender by making rude and insulting comments.

Why he is so unappealing: This is the only type of behavior on this list that is, in fact, a total deal-breaker. And it's not surprising. What woman do you know that would like to be in a relationship with a man like this?

What to do if you're that guy: You need to reconsider your attitude if you are this type of guy. This type of behavior is not only rude and nasty, it is often the last straw in breaking up a relationship.