I have found that Cambodia is very different,
Here is a lot more friendly and you are not likely to ripped off in the same way as Thailand. The people seem more genuine and as many of the expats here work they are less cynical and really nice and friendly.
I have noticed that the people coming from Thailand who have the best time are the relaxed friendly ones who treat the people here with respect. There are also those who find it not so good but generally they are the types who are constantly thinking someone is trying to scam or rip them off. They also tend to be the ones who sit and drink draft beer and complain about everything.
Cambodia has a lot of big spending tourists and expats and most nights there are people in the bars I am involved in who spend 200 to 400$ in a night on lady drinks and have a great time.
The thing about here is that it is slower and less in your face, if you want instant I go with you 2,000 Baht situation stay in Thailand but if you are happy to work a little to get the girl you want and invest in a few lady drinks you will have a far better girlfriend experience.
Many times customers have bought one lady drink for a girl and asked her to go and been either quoted high money or been knocked back only to find with a little perseverance of coming in a few nights running and buying her a few lady drinks she then agrees to go at a lot less money. She will justify it to herself by thinking this is a good guy who likes me!!
So really here is more about your attitude, smile, be friendly and polite and you will have a great time!!