Its a matter of choice, but you obviously are doing a lot of things wrong and assume things that are wrong as well.
That or you just think it's not worth reading all my posts. Let me clear a few things up.
1. I can do utilt just fine with or without tap jump. I have decent finger control.
2. I claw, so the advantages it gives me are more important, because our problems would be different. Ex) I do not need tap jump for dair MK out of grab release.
3. I use c-stick so I do not bother worry about using a jump as I uair, but it requires simultaneous input with up and A. If you press up too early, you will jump before you uair, again like I said if you do it more power to you, but I'll just use that yellow stick.
4. Now about using your second jump when you upB in midair. I found a video just for you
http://www.youtube.com/watch?v=7LhkXMBvjnk
M2k shuttle loops 6 times in midair. All six times he used his second jump (2:02, 2:52, 3:16, 4:13, 4:18, 4:34) as shown by how MK's shuttle loop started a bit higher than where he was when he inputted it. Clearly upB has a stricter timing to not use your second jump. Again it is a matter of timing but I'm not going to bother learning it when I can just turn tap jump off. And if you can do it cool, you're obviously better than m2k
5. Now regarding the SDI point, I actually TDI by habit, instead of qcdi. It's something I have to fix, but right now I am covering up with tap jump off.
It's not like I'm making false assumptions, tap jump off is based purely on my own experiences. I am fixing my own mistakes, and I have my own solutions that may not be conventional, doesn't mean I'm stupid though.
@punishment divine you're right tap jump on does not really hurt. The situations I mentioned occur only a few times throughout the match. Having tap jump on/off is one very minor point that fluctuates in importance on your control scheme.
@MintyFlesh
Yes I am, I'm surprise you remember. I would love to john about that first game, I can't really for the second game, but I would still do it XP MM when we play next time?