StrikerS was the worst season out of the 3. I think it could have been because KONAMI refused to take part in Season 3 that led to its demise, but I think the storyline was horrible, too many characters for only 26 episodes, and it just dragged... and dragged... and dragged... Only five episodes I really liked and it only involved Vita. She's my absolute favorite character. My #2 favorite of top 3. (( Fate being number 1 and Hayate #3.))
Except Subaru and Vivio. Subaru was awesome, and Vivio needs her own series. Caro and Erio needed more screentime to develop as characters, but they pretty much got shoved off to the side once Vivio made her appearance.
Acous, Schah, (or however you spell her name) Vice and about half the supporting characters could have completely disappeared and nobody would have noticed.
And poor poor Hayate.... THE SHAFTING! OH SWEET MOTHER OF GOD, THE SHAFTING!