Hey, hey, hey!
One thing I like about the Sweets character (especially in the early years) is that he is a person who is meeting Booth and Brennan at the same time, so he’s meeting them as partners and as a pair, so to speak. Every other character knew one of them before meeting the other, and that affects loyalty. I’m not saying the characters are picking sides or anything…it just was nice for a character like Sweets to only experience Booth and Brennan together.
I think it also brought B&B closer together as partners and a team unit. I think at this point, they both saw themselves more as individuals–that is, they recognized their own skills and what they both brought to the partnership, and they respected one another’s skills. But with Sweets, they started to see their emotional power as partners as well. They weren’t just successful on cases, they could help Sweets emotionally as partners as well. Brennan and Booth (at this point in the series) had some self-esteem issues in terms of their personal self-worth. They had/have a lot of self confidence in terms of professionalism and other skills, but joining together to help someone with relationship problems is new to them, and I think ultimately leads to them growing in confidence.
For example, your moment of B&B:
PS… I took a ceramics class and NO ONE makes the kind of items that Booth, Brennan, Sweets or April made in this one-time session unless they are serious about ceramics, haha. But oh well.