Hmm, when I'm not getting a foul tire taste, I'm getting very little flavor. This is a problem for me. I'm glad you folks are enjoying this thing, but as Riffy said, it's finicky, which isn't what I wanted coming from cartos. If it was fool proof, I would be willing give up some flavor. Problem is, this burnt taste is worse than anything I've ever had go wrong with cartomizers or carts, which both IMO give better flavor for my juices and I've tried 6 different flavors now.
I may buy some SR atties, but not unless they get cheaper. I won't be buying anymore eGo-C stuff at this point. I'm already back to using cartomizers, which I hate, but I'm relieved to be safe from the tire taste.
For my fruit/lighter flavors I use the SR atty head and a regular joye eGo batt (3.2/3.4v underload - the Riva is 3.7v) or the VV eGo set to 3.3v. Higher wattage does tend to wash out flavor. Perhaps you could pick up an joye eGo batt on classifieds and perhaps an SR c atty head.