I think it was Papazian who quipped along the lines of "Best beer in the world, the one one I've got in my hand right now".
Now he is certainly correct but where "homebrew" has fallen down for years, certainly from my observations here in Australia, is within the group of "brewers" who having made their first kit undergo some form of epithany where forever more the commercial product, which no doubt they had been drinking for years, becomes megaswill and their own particular brew is nothing short of fantastic, this group ridicules those who find the HB not to their peronal taste as running lackeys of the megaswill conglomerates. They see their own particular brand of beer, complete with diacetyl, acetaldehyde, rank fermentation problems, and a KFC of phenolics, fusels, cardboard, and cats piss on a hot tin roof as superior, as real beer should taste and no doubt, for their own individual taste may be correct but the average consumer (the ridiculed one with an apparent taste for swill) finds that the product tastes like, lets face it, homebrew.
Now, fortunately most, if not all of the contributors to this forum are not in that group. To the contary they strive to make good beer, the best beer they can and to a large extent they do.
Arguing senselessly and needlessly about the merits or otherwise of kit or extract or AG is pointless.
Most homebrewing in the States is by way of extract plus specialty grains and yes I grant you they have a much wider range of specialty extracts available but this is only in response to market demand.
Infections aside, the most dismal homebrew beers I have ever tasted or for that matter made are AG and I have tasted a lot of beers and judged a lot of beers.
Get your basic techniques correct with KandK (following the ThirstyBoy Manifesto is as good an advice as anyone could give you).
Learn that beer has faults, learn what they are, how to identify them and finally how to reduce the impact on your beer.
If you can take a fresh basic kit, a kilo of sugar and please some decent yeast (say US05) and make from that a bland, but easy to drink beer (how some describe megaswill) then you well on the way to being a champion brewer. Use these techniques and then start ramping your beer up.
K