Only Me is a relatively new steamboat & BBQ buffet restaurant that opened in Kepong early this year. Despite being the new kid on the block, they are doing exceptionally well and are giving QQ a run for their money. If you don't know yet, both restaurants sit in the same row and they are just a stone's throw away from each other.
Gourmet Definition is a steamboat restaurant in Sunway Giza Mall which started their buffet not too long ago. Prior to that, they have always been known to serve good fusion steamboat with fresh and high quality ingredients.
I have been to countless steamboat restaurants but OIC Cafe takes the cake for being the weirdest - in an awesome way. The steamboat buffet restaurant is located on top of OIC's other two concept coffee house and a la carte restaurant, and all of them share the same purpose-built building in Aman Suria.
QQ BBQ Steamboat is a popular hot pot and grill restaurant in Kepong. Our first visit here was a couple years ago and the experience was below par. But a recent revisit showed that the variety and quality of the food have improved, so much so that I'd rank it as one of the better buffet restaurants out there currently.
If you happen to be in Chiang Mai and looking for a place to enjoy a no frills dinner, I will recommend Sukontha buffet restaurant. Sukontha is supposedly the largest restaurant in Chiang Mai and one of the best places to experience Mookata, a Thai barbecue steamboat. The price is only 209 baht (~RM25) per pax.