If it's the content you're concerned about, I'll tell you the advice that you'll hear from every single photographer you ask: Just get out and shoot. Have your camera with you as much as possible. Not all of your pictures will be good, but getting out and getting the experience behind the lens will do wonders for your photography.
Great advice and very true. I was out today on an Island (Margaret Island) which is like one big lawn/park and the light was very mixed. Lots of shadows from the sun moving into different areas of trees, but the parts not in shadow were extremely bright. Makes metering a real PITA, especially depending upon the color of the surfaces which the light is reflecting off of. (This is important because the reflected surface is what your camera meters from)
Anyway, I think I took about 200 candid shots in a couple of hours, and have already culled about 100 of those. I don't save shots which are blurry unless I intended on them being that way, and it happens more often than not, that shots WILL be blurry. Reason being ? User error. Sometimes it's blatant error, and sometimes you're just so caught up in what you're shooting, that you forget to do something like what I should have done today, which would have saved a few more decent shots.
An example, and what I should have done, was to turn my ISO up to at least 400, though 800 would have been ideal, in those shadowy areas. I was shooting in Aperture priority, as I mostly do when I'm in a mixed light situation and don't want to miss an spontaneous candid event. I noticed afterward that a lot of my shots had a shutter speed between 1/100th-1/250th of a second. Not even near fast enough to freeze a person who is moving at a normal pace without some motion blur.
That is the part I was building up to. But without further information about your photos etc.. I'd rather not keep babbling on, out of fear that you already know this, and it's another issue all together. There are a lot of reasons why you're getting said results. And I'm still curious to see your samples.
Doug