How about a brief questionnaire thing? It's pretty basic, but I'm curious what you all have to say.
Why are you a Dixie fan? How long have you wanted her in Smash? Why would you like her to be added to the roster?
What's your favorite game that Dixie appears in?
I've been a fan since I first played DKC2 as a kid in the mid 90's. Monkeys were my favorite animal when I was little, so DKC2 naturally appealed to me. I initially preferred Diddy because he was the "boy" character and easier for me to identify with, but I eventually grew to like Dixie more. Her awesome abilities made me feel like a badass, and I also liked her character design. She quickly became one of my favorite video game characters of all time.
I guess I've wanted her to be in Smash since I saw her trophy in Melee. I think that moment is what cemented the possibility into my mind that she could end up on the roster. Shortly after Brawl launched in Japan, and dataminers found the Forbidden Seven, I got suckered into believing the rumor that she and the others would end up as DLC for Brawl. That was a huge disappointment for me because I missed out on my most wanted newcomer and my two Melee mains (Mewtwo and Roy).
I want her on the roster for mainly three reasons. First, like I said before, she is one of my favorite video game characters of all time. I always play as her in every game she appears in, and Smash would be no different. Even with all of the time I've dedicated to learning Palutena, I would drop her to a secondary in a heartbeat if Dixie makes the roster. Second, DK representation in Smash would still feel incomplete to me without her, even if K. Rool makes it. I feel that she's iconic enough to be considered an all-star, and so I believe that she deserves to be included on the roster with the rest of Nintendo's greats. Third, I think that she has the potential to have a very fun unique playstyle. If she ended up being anything like we've discussed here, I think she would really shake up the metagame and make competitive play more interesting.
As for my favorite game that she's appeared in, I can't say anything other than DKC2. Tropical Freeze was really good too, but I have put way too much time into DKC2 to not say that it is my favorite. It was a staple of my childhood.
EDIT: On a side note, while lurking GameFAQs, I just saw someone link to this thread to win an argument about Dixie's potential to have a unique moveset. Today is a good day.