Usually I open girls by just saying Hi and then talking, if they want. However, once per night perhaps, I see a girl who I find really attractive so I open with honestly saying that. It isn't concious or anything, I've just noticed that it's something I do, probably because socializing the whole night makes me more comfortable being honest.

Usually girls really like it, and we'll take things further. However, I'd like to know if there could be problems with opening like that. When you just open with Hi you can always calibrate after, but could saying you think she's beautiful cause problems somehow?