I see this is an old posting, but nobody seems to have replied, i just found this site, so i'll put in my 2cents. Don't know what tuning you use, but if i want to sound country i use a G (or A) tuning; for blues i always use D (or E). I spend a lot of time on the 1st & 3rd strings in D tuning and it's easy to slant back on the 3rd string for the blues flat3, not so easy in G. I know a lot of blues players (incl. Robert Johnson) use/used the G tuning a lot, but this is just what works for me. In fact i taught myself 'Come on in my Kitchen' from memory in E tuning, played it that way for yrs. & thought i was exactly copying Johnson until somebody informed me that he used a G tuning on it. Oh well.