Dr. Guerin's interaction with patients is excellent. His enthusiasm and willingness to take time on educating is quite refreshing. His approach seems to be that this may be your only visit, and he'll take complete advantage in trying to ensure you're up to date on the latest data and practices to preserve your dermatological health.
I ended up with Dr. Guerin fairly randomly, and trying to schedule an appointment with a dermatologist in Portland seems to involve months of wait time. Through good fortune, Dr. Guerin had an opening, and I ended up in his office just a week after making the appointment.
He's thorough and very professional, and his demeanor makes it clear that he takes his work (apparently a one man battle to reduce excessive sun exposure in the US) very seriously, and with boundless enthusiasm. His energy and the sense that he's personally interested in you health makes interacting with him a pleasure.
I highly recommend him if your searching for someone to look after your skin...