Hey! A lorakeet!
The cat one cracked me up, so I think that was a good subject. The coke bottle with the funky color was kinda neat. Again, interesting subject. I looked at the coke can for a couple mintes. Neat subject, and I think you got this shot pretty nicely framed. The bird in 5 is a very pretty bird.
So now the things I think you should consider going forward...
1. A lot of your stuff is overly centered, which tends to leave a dull image as a result. (coke can, bird) You can certainly center things some times and have it work, but often the "rule of thirds" is a great way to go. (google that) (the framing on the cat is unfortunate... his face is off to the right, which seems weird for the shot for some reason to me... and he is dead center vertically... having him lower in frame would probably work better)
2. A number of these are underexposed. (5, 4, maybe 2) Just watch your exposure, check your meter on your camera when you take shots, bracket special shots so you make sure you got 'em, and consider taking RAW shots for really important things so you have more leeway.
3. Try to take up more of the frame with the subject... not always... but sometimes... I think #5 would benefit from this, but the good news is you could crop it a bit to move him off to the side and up/down in the frame, and get a great result.
4. Looks like your focus wasn't dead on for a couple... not sure. Mild sharpening would probably do well to fix most of this.
Overall, some interesting pictures- just need a bit of tuning I think.