I'm still on the fence with the Xindi storyline. It had its moments, yet it could have been better.
Or, better yet, it could not have happened at all.
I never bought into these "what's your favorite/least favorite season of Star Trek?" discussions before, then that worthless Xindi season happened.
Most notably, it achieved the impossible. It took Trip, who was an insufferable, unlikable, loud mouthed jackass from day one, and turned him into an insufferable, unlikeable WHINY loud mouthed jackass.
But, I understnad some people like the Xindi arc, and I'm fine with that. I just don't.