On the whole, I hate buffets.
In the UK, they're just awful. And I cringe every time I go past a Chinese restaurant with the word Buffet plastered on the side. It's just awful, nasty stuff. I am Chinese, and I would never touch that junk! There is a reason you don't see a Chinese restaurant with a buffet full to brim with Chinese folk, as we know it's bad food, and it's just not what we eat traditionally.
I've had a few buffets in the US as I've been taken out on meals by friends/go with the crowd. Quality of food is just awful too.
The only buffet I've ever really liked, for dinner, was at a resort in Malaysia. But then it was 'cheating' as they had a chef there make up an order of fresh noodles for you on the spot.
That time, I had a starter plate, 1 main plate and the noodle bowl, and a desert plate. So it seems I don't tend to take advantage of the buffet 'advantage'.