I use cowboy brand lump charcoal. I tried kings ford once since, and noticed such a difference in taste that I swore off the mixed stuff completely. All natural lump coal or nothing.
And +1 on royal oak. I swear last time I bought it, there looked like pieces of charred 2x4 in there, and burned extremely fast.
		
		
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Kingsford over here. Atleast it's what I use when camping, around home I just fire up the propane grill, faster and more convenient, and I'm not a very picky guy lol.
		
		
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I've grilled twice with the RO all natural hardwood briquettes.  So far, so good.  Easy to light, not too much ash, seem to burn pretty hot - my steaks cooked quicker than I expected.  The briquettes are a tad larger than most, seem to last awhile though I haven't tried smoking with them yet.  
In case you're interested: 
http://www.doitbest.com/Charcoal+and...sku-838136.dib
		
		
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