My father went from the green fatigues that you could either blouse with combat boots or wear with low quarters. You could also get the sleeves cut to short sleeve. Then they went to the earlier BDUs (the waist tabs on the blouse being the biggest difference that I can remember). He had a pair starched so much you could stand them up on their own. He also had a few pairs without the stripes (he was enlisted) and the velcro patch for rank and AFSC. What a dumb experiment.
Here's a few pics of me getting issued ABUs in basic.
I joined at the start of 2008 and was one of the first flights to get issued all ABUs. It was weird transition period. BDUs were still allowed and since the green ABU boots were not common place, you could wear desert boots with ABUs. You could also wear the green ABU boots with BDUs so you wouldn't have to polish. I hated the short little, steel toe, danner style desert boots we were issued, so once I got to my school, I ordered a pair of Altama ripple sole desert boots. I had always liked how slim and tall the OD green jungle boots made you look, and one of my TIs wore the same desert boots during basic, so I was sold. We were issued an ABU pattern rain coat that I never saw anyone else outside of basic wear...I got plenty of "is that in regs?" and "where did you get that?!" when I got to Japan.
The ABUs we received in basic were the super thick ones with the STUPID and USELESS "map pockets" inside the blouse. You could cut them out so long as it didnt change the appearance on the outside. There were also issues with the coloring on the ABUs when first released. There was a mix of items that were green in tone and others that were gray. I received 4 pairs, 2 of which were green shaded for the blouse and the pants, and the others were gray. I preferred the green and used the gray ones for security forces augmentee training and duty.
Nametapes were also an issue at the start. The TIs who got their ABUs early couldn't get their hands on ABU pattern nametapes so they had to use ACU patterned nametapes. You could tell the obvious difference in the colors and pattern.
At the end of 2011, ABUs were mandated and desert boots would no longer be allowed. A SSgt and I in our office got so much shit for wearing desert boots until the last day. Even a TSgt on quarters wearing tennis shoes in uniform would tell us we needed to get ready. We went to Andrews AFB to get green boots and ran into a 1 star at clothing sales who was buying her pair at the last second too. I was pissed because I was going on terminal leave in January and only had about 90 days to wear the damn things. One of my buddies who got out hooked me up and gave me a pair so I ended up not having to buy any for my last 3 months.
I still work with the AF and just got back from a TDY. The units there were almost all OCP. Some had a weird mix of ball cap and patrol cap.