There are hundreds of angling blogs out there, of vastly varying degrees of quality. For me, they tend to fall into one of two categories: a) the occasional ramblings of enthusiastic but untalented thrashers (guilty as charged m'lud!) and b) writings of accomplished fishers - be they guides, competition anglers, magazine contributors, whatever.
The latter category should provide some really good, informative material you would think. I rarely find this to be the case though. The foremost practitioners of our sport are probably too busy actually fishing to be bothered writing about it and often such a blog will serve more as a tagline to a main website advertising various guiding, fly tying and tuition services. Fair 'nuff.
There is one example out there that bucks this trend; I have been following it for a while and urge those of you who are unfamiliar with it to do likewise, as it is one of the best and most informative fly fishing reads in the blogosphere - Stuart Minnikin's Yorkshire Dales Flyfishing.
Stuart has been there, done it, and got the badge - he's fished for England, has an APGAI qualification, offers first class guiding and fly tying services, and knows his native Yorkshire rivers as well as anyone in this land. When someone like Stuart has something to say, any fly fisher with even moderate aspirations to improvement needs to take a bit of notice. Happily he somehow manages to find the time to write lengthy, considered and absorbing blog posts which are entirely free from the hyperbole and self promotion you sometimes find elsewhere. Trust me, it's excellent stuff and well worth a visit.
See link above and under the 'blogroll' heading adjacent.