like_a_UB_Bull: First off, I'd like to say I don't think that large breasts are quite analogous to big dicks. They serve a function in sexual stimulation. They work for the purposes of arousal, for most men, but they don't directly infer that the woman would be a good lover. A better analogy would be big breasts=big arms.
Having said that, it'd be cool to be noticed once in a while. I don't get noticed unless either it comes up in conversation, or if I actually take my pants off. I'm not huge flaccid, so I don't really impress 'em with tight pants.
While I don't get noticed much, girls never seem surprised when they find out. I have many of the distinguishable "manly" traits, such as a deep voice and muscular body, so it's never a shocker that I've got a big dick.
But though I'd like more attention, I wouldn't want to be notcied so often that I got tired of the admiration. Some girls just seem to get really tired of having their breasts brought up in conversation, to the point that they say things like "I'd give them away if I could."