Yes, the seating is defintiely a likeable feature in the 767. My fav is also the 767-300... I try to fly it as often as I can. My last flight on it was last year from ORD-SFO so I have to make an effort to get on another one soon.
I guess for me it's all about looks. The 763 looks awesome... both from far away and close-up (and of course inside). It doesn't have the mean, angry look that the 757 has from the front and doesn't look overly huge like the 747 from the side. It looks and feels like a friendly aircraft. Everything looks proportionate and in place, even the wheels. Of course, it looks the best in UAL and AA livery. I will say, however that the all white paint scheme looks a bit awkward on the 767... it makes it look smaller.
It's also one of my fav aircrafts to ride in. Next to the A330, I think it has the smoothest takeoff and climb. Flaps fully deployed also looks great on final approach.
Its better to be on the ground wishing you were in the air than be in the air wishing you were on the ground. Fly safe!