Hi,
so I'm good at conversations with a really smart girls, because it is easy for me to find stuff to talk about with them, but when it comes to conversations with a girls that are not that smart (I'm not trying to offend any of them), it just happends that I can't find the right topic and I get bored quickly due to lack of stuff to talk about with them.

Could you suggest me some general topics that I can use when I'm out of inspiration? Thanks!

Just go for smart chicks. I have this same issue. Don't settle for a dipshit. It just pisses you off. I don't give chicks like that a second of my time anymore. My breaking point was with this chick that told me "I shouldn't use so many big words". I said "you should throw a brick through that tv and read a book" At that point we came to the realization she was content being dumb and I'm not dumbing myself down for anyone. It was said nicer but this was basically what went down. Never looked back and don't regret it either. I've got a girl now that I can talk to.

That really made me laugh, because I was tempted a few times to say the exact words.
I really agree with you, because having a smart girlfriend is awesome, but I'm just trying to improve my skills, so I was thinking not to focus on only one imparticular type of girls. Somehow I have the feeling that dumber chicks are easier to seduce or I'm being wrong?

Oh your absolutely right. At least from my observations. Dumb chicks will jump right in the sack without thinking of the consequences. Us brainy folk think about our futures. I guess I misunderstood what you were looking for. I thought you were looking for a serious deal. Bang on my man. Id say each target will be different. Find out what tv shows are popular right now. Find out what they're into and act like you are to. I know what your saying about not being able to have a good conversation. That's why I just stay away from them. I find it very unattractive. Plus I'm always trying to improve as a person. People like that are content to sit in their shitty diaper and change nothing. They think society should adjust to them. It disgusts me. Can you tell I've had some salty experiences with dummy's. lol off my soapbox.