Some images look good, very sharp (i.e. first car shots), some look soft (i.e. dog, first picture of your brother), some are a bit over exposed (i.e. image of you leaning against the tree and the last one with your brother) and the flower is definitely OOF and very grainy. I haven't looked that the EXIF data but assuming the camera is set to its default settings, I'd start by knocking down exposure by -0.3 Ev. This will/should take care of the over exposure since it's minimal. You might also look into the Pict Adj. and increase Sharpness to +1 and NR also to +1. I find this combo better than 0-0 because it will help reduce noise in low light situations. Lastly, always make sure you pre-focus first. I can't tell whether the flower shot is OOF or it's blurry due to camera shake (or perhaps a combo). Also, make the stabilization is set to Mode 2 and cap the ISO to 800. You might want to save a high ISO setting in one of the My Modes for real dark conditions.