First thoughts right after watching the Movie
My first thought right after watching the film is that they are very comedic together, and it’s very funny, but…… it does not make them the most developed. It was interesting to see all of the versions of Buzz reacting to her, and all sides being attracted to her, but you know it’s not to develop the couple, but for laughs. I like them, and they are easily the most interesting couple of the main group (I do not consider Barbie and Ken to be the main group). It will be interesting to see where these two go in the future, after watching both films.
Summary
We only see a hint of their interactions in Toy Story 2, which is ironically when the main romance is abandoned. Jessie is talking to her horse about how she really likes her new home, and the fact that they have a family. Buzz nervously walks beside her, and stammers about how she is a bright young woman, who has a beautiful yarn-full of hair. He is extremely nervous, and tries to walk away in embarrassment, only for her to hold him, and claim that he is the sweetest space toy ever. After performing a trick he did in the first film to open the door (the one he used to act like he could fly), his flyers uncontrollably sprouts, which we all know is a sign of…. attraction.
We do not get another interaction between them until the middle of the movie, where Buzz Lightyear’s programming is set to “auto-mode”. She mouths off about him, and even in his programmed version, he notices how good looking she is, claiming that he will be “immune” by her bewitching good looks” as he is locking her up.
Most of their interactions take place in the second half of the movie, due to Woody going to Bonnie’s house (meaning a lot of the narrative goes there), and we have to follow the veteran villains, so our main crew in general has a lack of screen-time.
So they continue their escape, and he cannot stop from dancing around her, even dipping and twirling her around. When she runs to hug Woody, Buzz is heartbroken, and drops the dandelion he was going to give her.
They are in the garbage chute, where Jessie ends up stuck, so he obviously runs back to save her. It is seen as another telenova moment, and he picks her up in slow motion. We get a closeup of Jessie bewildered and out of breath from Buzz, and he gives her a slightly smug look to the damsel, but a television is about to fall on them. Since he is such a hero, and sees the television falling on them, he throws her to safety, and it ends up falling on him.
At the fire scene, she asks him desperately what they’re going to do, and all he does is grab her hand. They lean on one another, as all of the toys are expecting to burn, which is pretty sweet. Even after they escape the garbage chute, their hands are together, and neither one of them realized it. I am assuming the lack of reaction means they are official? They hold hands again while on their way back, and there’s no awkwardness or additional dialogue, so that is what I am going with. Apparently Buzz said this in Spanish “Come with my young lady, I’ll show you the wonders of the galaxy and with out love we kill/beat/finish all evil”.
Of course I have to address the post-credit scene, where Jessie and some of the other toys place a radio to play spanish music, which causes the space toy to uncontrollably dance in confusion. Jessie tells him to go with it, and they have a nice tango routine (I think it’s tango, but I could be wrong). We know that Toy Story 4 will heavily involve romance, and while they won’t be the main characters, I am sure their romance will be more prominent in that film.
Final Thoughts
What I will say is that they’re very cute and innocent, and there……. is….. not…. much. They make it clear that it’s a two-sided attraction, but they are not in a romantic relationship either (for most of the third film), so it’s a nice beginning. Because their relationship and interactions are played for laughs, there is not as much development. It’s nice to see two nervous people get together, and there is chemistry, so I will give them that.
animatedkid 
Yeah, it really isn’t well-written at all. More of a crush, at most!
Pretty much. We’ll see what happens in Toy Story 4, though they’ll probably still be comic relief.
The focus of Toy Story 3 was not meant to be Buzz and Jessie’s relationship, but it was a sweet subplot that progressed nicely throughout the film, bringing them together at the end. I can see plenty of serious emotion between them in the more dramatic moments of the story, when he is concerned about her, and her about him, and when all hope seems lost. Pixar’s films say so much without words, you have to pay attention to the subtle expressions and reactions of the characters. Watch Toy Story of Terror, and you’ll see how their relationship has truly developed into something far deeper than a mere crush or simple humor.