Chunsoo, you've gotten a lot of compliments and few suggestions, I guess to encourage you to keep on a positive path, so let me add, then, some constructive criticism.
Your phrasing is too stiff. It is way too constricted. You need to free up the feel and rhythms. Also, you need to decide where the phrases are and make sure that you outline them to the listeners (and to yourself) by the way you use your dynamics, articulations and where and how you breathe.
If I'm not mistaking, this is a common problem you have in your classical etudes too, so that tells me that you are still not taking enough care before
you play (or reflecting on what you've played, after you've played something) that you should be doing. You seem to be doing the playing part but you still don't seem to be doing the thinking part as much as you should.
I suggest you listen to the composer of that song (Mel Torme) singing it - many, many times - and sing along with him until the two of you are one.
At first you'll be able to feel and hear immediately the conflict between how you are hearing it and how he is feeling it. Do this until he and you are one. Then and only then, play along with his singing, again with the aim of being a saxophone version of him. Once you've got that down, then try it alone with the play-along.
This will probably be fairly frustrating, but if you can stick with it, stay relaxed, you will definitely be gaining style and aesthetics you can use for the rest of your life and in other ballads you will play.
Here are a couple of sax versions to give you something to think about:
Mr. Laid-Back. Dexter Gordon, My Man:
- (don't miss the last minute)