To answer my own question:

• changed political and economic views (similar to Matt).

• changed views on the effects of Nutrition and activity on health (including the actions that follow from that)

• changed view on the dangers of GMO (yet again)

• I became aware of areas where I am very ignorant of opposing arguments, and try to counterbalance

• I finally understand the criticisms about the skeptics movement

• I repeatedly underestimated the amount of ignorance in the world, and got shocked when discovering that

And on the funnier side. Last week I found out that i learned a minor physics fact wrong. That was not a strongly held opinion, just a fact i never looked up again till now. For some reason i always was convinced that the volume increase in freshly frozen water is 10x, while its actually more like 9%