Hello Chris and welcome,.......Others will add their views I am sure, but for my 2 pennorth (for what its worth) .................
Easier if you number your shots ,
1, Nice colours , good focal point and DOF, maybe just saturate the colours a wee bit (for me anyway)( could just need a bit more light (trial and error is good)
2, No focal point, just looks like an OOF (Out of Focus) shot.
3, Almost there, just need a little bit more light inside the central section of the flower,
4, I like this one the best really, better lighting and good use of DOF.
Nice first set, Good colours and a well worked set, keep it up, I am sure you will get some more constructive replies soon.
Dave ....
.