(I can't think of anything particularly notable that happened in 2010 to be able to provide an umbrella description for it so I'll come back to this later)
I think the most notable aspect of 2010 that I'm noticing...is that it's clearly when I first discovered all the immature amazing things I could do with the word filter feature. In this section you will notice such things as the word 'penis' in rainbow colors, or harmless words like 'cake' filtering into 'bukkake'...both of which are childish classic traditions that continue to grace our forums to this day.