For some context I been watching anime for almost 15 years and looking back I still look back on the first few shows I remember watching and oddly remember almost the specific dates/ time periods when I them.
So I started to really get into anime in 2012 but really watch seasonally in Summer 2013 and still watch seasonally today.
Here is my list. (All completed at the time)
One Piece (Feb 2012 - Jun 2012) - I caught up on June
Fairy Tail ( July 2012 - Sept 2012) - I caught up on September
Soul Eater (Oct 2012)
Future Diary (Oct 2012)
5.Sword Art Online (Dec 2012)
Bleach (Jan 2013 - Feb 2013)
Angel Beats (Feb 2013)
Full Metal Alchemist ( March 2013 - April 2013) - Both 2003 version and Brotherhood
Tengen Toppa Gurren Lagann ( April 2013)
10 . Tokyo Hitman Reborn ( May 2013 )
And from there I start watching Seasonals Like Attack on Titan, Kill la kill etc
So I like to your first 10 shows you watched as an anime fan and have oddly strong memory like me where you remember specific time or dates when you watched them.