I am a strong proponent of transparency and honesty. Especially when offering my services to potential business partners. I think there are many things that I do reasonably well. I think there are a couple of things that I do very well. I think there is a maximum of 1-3 things that I do exceedingly well… But expert in something? Maybe, but I am certainly unsure about it. And I would most assuredly hesitate a lot before telling anyone that I am an expert at anything.