It is difficult to tell anything about #1 because it is so small. #2 and #3 look very soft.
For these two shots I think you used the 18-55 kit lens at full zoom, and maximum aperture of f/5.6. Shutter speeds were 1/60 sec and 1/80 sec. These should be fast enough to avoid blur from hand-shake, especially if you had the image stabilisation turned on. (Did you have the image stabilisation turned on?) And in any case you used flash for #2 so assuming that flash provided most of the illumination for the subject then hand-shake certainly shouldn't have been a problem. Subject movement should not have been a problem either, especially for the flash shot.
There might have been an issue with the distance to the subject - you might have been too close. Were you using autofocus or manual focus? If you were using autofocus and you got focus confirmation then the distance was probably ok. If you were using manual focus then you might have been nearer than the closest focusing distance, in which case you could not have got a sharp image.
There might also be an issue with settings if you were shooting JPEG. If you were shooting JPEG, what settings did you use for sharpness and contrast? Whether you shot JPEG or raw, there might be an issue with post processing. Did you do any post processing? The images can be made to look a bit less soft with some post processing, but there are some undesirable side-effects from the fairly extreme measures I used to get these results.
NOT MY IMAGE - LadyDeWinter flower2_DxO 10 JPG 01c LR by
gardenersassistant, on Flickr
NOT MY IMAGE - LadyDeWinter flower 3_DxO 10 JPG 01c LR by
gardenersassistant, on Flickr
Flowers are rewarding subjects, and from the compositions of these it looks to me like you have an eye for it. My preference, were it to be a bit less soft, would be #2, although the background in #3 works well with the subject for my taste.
FWIW I rarely use flash for flowers, preferring the look of natural light. But opinions vary about this. You need to experiment, perhaps capturing the same subject with and without flash to see which you prefer.