I tend to agree with AIHTOURS comments with regard to Neat Image. I don't use it on my digital shots but I do use it when I scan negatives from my old prints. I just use the basic automatic settings - auto profile, auto fine tune - then set the sharpening to 70% and accept the result. If it looks OK
I put the shot back into PS
Elements and recheck levels and possibly add one pass of light sharpening. This sometimes works but sometimes it looks like plastic ! When this happens I usually just file the original (pre Neat Image) shot and try another picture. Not much help I know !
Getting back to the C-130 and the Ryanair 737 they are both good, but there are still problems and as I think they are in the editing I'm starting to get a bit out of my depth on the advice front but here are my thoughts for what they are worth.
There has been a bit of a problem with the use of Neat Image and I think AIHTOURS is assisting you with this.
The next problem, which might be partly related to Neat Image as well, is that the aircraft somehow look detached from the background. Not sure if you are working in different layers but if so there may be an issue with the way you are merging them or using flatten image. This is getting into deep water in terms of my knowledge so if there any of the editing experts reading this they might like to comment. If this could be sorted out the C-130 shot would look pretty good but you may be getting close to the point where it is edited to death.
There is another problem with both shots in terms of the crop. This is easy to fix if there is enough image left to alter the crop or you are willing to go back to the original and start from scratch with a different crop. The problem is that the aircraft are both now rather low in the picture. To correct this you need to crop out some of the sky from the top of the frame and bring in the sides to keep the aspect ratio. Don't worry if you cut off the wing tips that is not a problem. Unfortunately if you do crop in from where you are now I fear you will be below minimum dimensions in which case the only option is back to the original. Although the target size is 768 high by 1024 wide I would not worry if a height of 768 gave you a width of up to about 1100 if it looked OK
The Ryanair 737 is still soft and I don't think it will really sharpen any further. The fuselage is also pretty burnt out and this would be difficult to fix. I think it is one for your personal album rather than A.Net.
If you are going to have another go from scratch, and I think it would be worthwhile, I would concentrate on the C-130. If you can incorporate everything you have learned in recent weeks it may well be worth submitting it (just one shot after all) and let the real judges - the screeners - give a verdict.
Sorry that I can't give more specific advice on the editing but hope the above is of some help.
As others have said - Keep Up The Good Work
One thorn of experience is worth a whole wilderness of warning.