In regard to Wolverine's sexuality, I'll be happy to debate it with you
You see, Logan's romance has always been with females in the main continuity. His relationship with Jean and Mariko Yashida have been part of his character and identity.
Logan is a lost soul who is seen as a wild animal, but inside his a kind and gentle man that only a few know about this side of his.
Having him being bisexual won't fit his character or his history and will cause more questions then answers. It won't work on him like it worked with Constantine, Iceman, or how Marvel is hinting with the Black Cat. These guys have explanations, Constantine because of his history, Black Cat because of her romantic failure with Spiderman, and it just flat out works with Iceman. With Logan, it's different, his life has always been rough and has found solitude with either Jean or Mariko.