Before I start I would like to say that I support all spider-man couples and will allow other peoples opinion.
Since spider-man is now single (and rejected by black cat for Daredevil) I thought it would an god idea to try and re-establish spider-man and Ms Marvel as a couple. I know that Mary Jane is an obvious choice and a fan favorite but if you think about it in terms of a writer there isn't many stories left for them (besides a successful marriage story). Even if that were to happen it probably wouldn't end well.
I think the interaction between both Ms Marvel and Spider-man would be interesting and develop both characters in new ways. Spider-man is a very complex character and has dealt with situations that other marvel heroes haven't, he (should) know himself very well but the one thing he hasn't had is a girlfriend that is a superhero. You can argue black cat but in most peoples opinion her main profession is theft (or security).
Spider-man wouldn't have to worry as much with Carol as he has with MJ or Gwen.Although you can argue he would argue even more since being a superhero is her job. If you have another idea for an interesting spider couples (like rogue and spiderman) feel free to comment.