To answer my own question

My answer is #4… but slightly more complicated.
Actually I did do Invisalign for almost a year. My case is not that complicated and I was textbook perfect candidate. As soon as that product came out I was very interested because the only reason I did not get braces up until that point was because I was self-conscious about they looked, and Invisalign was the perfect solution.
I got them; however, I was very undisciplined … for a few months I was excited about them and wore them religiously, then started wearing them only a few hours a day (problem was/is that I drink soda all day long which just does not work with Invisalign). And eventually I just quit totally.
My current dentist does not do Invisalign and when I told her I did Invisalign before but it did not work, and she agreed that Invisalign does not work for the exact reason. Regular braces are fixed and you cannot take them off, thus forcing you to make them work.
Having gotten to know myself better because of that experience, I knew I needed something which forced me to be more disciplined, which regular braces would do because they are not easy to take out.
Plus I reached a point in my life where I was not so self-conscious of having braces, and wanted to resolve that also. I thought it would be fun and would be a good experience, so I voted #4, although I could have also voted #5 or #6. I am very happy with regular braces and am less self-conscious of them than Invisalign (because for those I never wanted anybody to see, and was also nervous someone would notice them) and regular braces also probably hurt a bit less I suppose.
Interestingly nobody has ever asked me this so far, "Why didn't you just get Invisalgn?"
Although one or two people have hinted at it when I asked them why they do not get braces. Do others ever get this question?
34 y/o guy with full metal brackets and molar bands since 12/16/2009.
1st Adjustment + secondary molar bands 1/23/2010.
2nd Adjustment 3/27/2010.
3rd Adjustment 5/1/2010.
4th Adjustment 6/11/2010.
5th Adjustment 9/29/2010.
6th Adjustment 2/8/2011.