Every once in a while when I see a thread about which brand of pellets to choose, there's some discussion about oak as a "filler" wood in some brands. I'm always surprised to see this because I really like the flavor from smoking with oak chunks and when I use pellets, I look specifically for a blend with oak in them (like Lumberjack Oak-Hickory-Cherry.) I like what I like, so I'm not really looking to change what I use. But I'm really interested in opinions on oak in pellets, and specifically why I get the sense people think it's a filler. Is it just the fact that some brands market a fruitwood pellet as such but it actually contains something else? Is oak cheaper? Why the oak hate?