Here I'll be going through all of the past polls of the entire K-ON wiki. After collating results for each, I'll also add a bit of my own analysis.
2015[]
- October: Amount of manga read
- September: Amount of anime watched
- July-August: Keyboard Solos
- June: Preferred Band Role
- March 30 - May 31: Favourite Support Character
- February 7 - Ongoing: Favourite HTT Member
2014[]
- July 3 - Feb 7 2015: Least Favourite Opening Theme Song
- February 3 - July 3: Favourite / Most Wanted Manga Volume
- January 8 - Feb 3: Mio Mio Mio Mio Mio
2013[]
Most of 2013's polls went by a stricter, monthly basis
- December: Most Wanted Christmas Present
- November: Favourite Opening Theme Song
- October: Favourite Instrument
- September: Favourite K-ON Animated Media
- August: Favourite Non-HTT Character
- July: Favourite Ending Theme Song
- June: Favourite out of Sawako's outfits
- May: Favourite B-Side Track
- January 8 - April 27: Favourite 2nd Season Character Image Song
2012[]
- December 21 - Jan 8 2013: Favourite Instrument
- December 13 - Dec 21: Favourite Listen!! Outfit
- November 2 - Dec 13: Favourite Don't Say "Lazy" Outfit
- September 5 - Nov 2: Favourite Opening/Ending Theme Song
- August 4 - Sep 5: Favourite 1st Season Character Image Song
- July 4 - Aug 4: Preferred Band Role
- June 12 - July 4: Favourite Wakaba Girls Member
- April 29 - June 12: Broken poll. Probably to do with favourite HTT Member
2010[]
- September 29 - Jan 21 2012: K-ON Season 2 Opinion