I don't think B'Elanna has been in Taxon long enough for me to pick Taxon moments, but I can do canon.

Crowning Moment of Funny: When Tom caught her reading klingon romance novels.

Crowning Moment of Awesome: I'm only allowed to pick one? The entirity of the episode 'The Barge of the Dead' comes to mind. Or when she fought Vorik after he accidentally infected her with the pon farr. She also threatens to break people's legs a lot.

Crowning Moment of Heartwarming: Either confessing her love for Tom while they were on the edge of death or her eulogy for Captain Janeway.