#1 more distance from the subject, get it in the frame. Tags don't do anything for me though unless they are sublime. meh, no lose. Depending on the lense, some shots are to wide to be doable without multiple images and post process merging. Bypass these to find shots that work with that lense.
#2 not lined up completely on the left side which detracts from the image. It would look better if the edge of the white wall was shot so it began on the left side and was square to that side.
#3&5 subjects are not in the frame, toss em.
#4 a smaller aperture setting would have brought this out better. I like the lines though. Back up and get more in the frame too. If you got it squared off you can always crop out some of it in editing. More distance would make the aperture setting less critical as well.
#6 was there some cam shake here? Can't see what the aperture setting was but it should have been whatever your lense sweet spot is or higher, generally f/5.6-8
Don't be afraid to shoot head on as long as the composition works and you square up the shot. Experiment shooting the cam at any height from floor to ceiling if doing so can capture a good shot.
Try bracing the cam on door frames, walls, the floor, anything at the right height. If your shooting at 1/60 of a second or faster. Ditch the tripod and try free shooting. Learn the proper techniques such as pausing your breathing before releasing the shutter. If you think there was shake, shoot again. Shooting without a tripod just using what's there to brace to cam against is faster and fun. In low light with shutter speeds less than 1/8 second a tripod is needed. If you're using a tripod either use the cam's delayed timer or get a remote shutter release to avoid shake. Without a tripod you will toss more because of shake, but you can grab a lot more images. Experiment and see what works for you. Free shooting works better with heavier cams/lens and is dependent on good technique and rock steady cam handling.
Try for a keeper every shot, but take lots of shots to get a few keepers. Try to get the exposure dead on for each shot even if you're shooting RAWs. Remember to shoot the image from different positions if it warrants the attention, decide post editing what's best. If you're unsure of the best aperture setting, try a few for the same image/position. The end result isn't fully visible until the image is on a high resolution monitor
Use this site's blur charts for your lense to better understand it's capabilities, limits, and at what aperture setting is it sharpest.
http://www.slrgear...est/howwetest.html