I'm listing my top ten Buffy The Vampire Slayer and Angel episodes in terms of Bangel scenes. They're in chronological order, no hierarchy, because I don't think I could rank them fully.
This is the episode where their love is confirmed to be mutual and they first get together, so it had to be on this list. I thought the way it happened was so cute. Their first kiss was beautiful, but what I really love in this episode is the ending. They talk about how they're love has to be doomed, but they can't walk away, and when they kiss for the second time Angel doesn't pull away even though her cross necklace is burning him.
2. What's My Line Part 1
This one is here for the beautiful ice rink scene. Buffy kisses Angel in his vampiric form and says she hadn't even noticed it til he pointed it out. It really summed up the fact that she accepted him for what he was.
So much in this episode. I find the scene when she goes to visit him in the morning after her dream really cute, and I absolutely adore the claddagh ring. Really love the symbolism of that one. And of course, the ending....
4. I Only Have Eyes For You
Even though this one is more Bangelus (maybe) I really like it. The possessed kiss was beautiful. And I liked the fact that the ghosts picked them in the first place. There were so many parallels between the 2 relationships - both in the current situation, with Buffy feeling that she killed Angel, and with season 3/The Prom.
5. Becoming Part 2
One of my 2 favourite episodes ever. The entire scene from when Angel regains his soul to the end is brilliant and heart breaking and amazing and perfect. The music I especially love here. And no one who isn't a Bangel fan (or a BTVS fan) could understand how the simple phrase "close your eyes" could be so painful.
The scene on the hilltop at the end of this episode is beautiful. I love the dialogue in it. And miracle snow! This episode is here too for Buffy and Angel's shared dream, that was both sweet and hot.
7. The Prom
I really like the fact that Angel turned up to her prom despite the break-up, and despite not really getting the idea. It was just important to her, so he did. Their slow dance was bitter-sweet and I liked setting it to the song Wild Horses.
8. Graduation Day Part 2
This could be here just for the very idea that Buffy was willing to let Angel bite her - that she trusted him, even poisoned and dying, to control himself enough not to kill her, and the underlying suggestion that she'd be willing to die for him if he needed to take that much blood. That bite scene was amazingly hot. I still can't really believe that it got past censoring, especially since having read Sarah Michelle Gellar's comment about it.
9. I Will Remember You
Another of my favourites. This entire episode is amazing. The sunlit kiss is one of my favourite scenes in both series, and I love the lead-in to Angel meeting Buffy there - Doyle asking what Angel would want now he can have anything. The very idea of him becoming human is beautiful. And bitter-sweet. Half the reason he gave it up was because he couldn't risk letting go of the chance he could save her.
The last Bangel kiss we saw. Even after having been separated for years by this time, it was like they couldn't resist. And it so wasn't put in just to appease us shippers! Also the cookie dough speech, in its hilarious cuteness. It's clear that Buffy was considering Angel in that speech, at the least, or she wouldn't have corrected him later. And he practically said he'd be waiting for her!
Honourable mentions to Angel giving Buffy his leather jacket in Teacher's Pet, Angel describing when he first saw Buffy in Helpless, Buffy's dream in Anne, the quote "You still my girl?" "Always" from the end of Enemies, Angel turning up after Joyce's funeral in Forever, and Buffy saying she'd loved Angel more than she'd ever loved anything in this life (while talking about having to kill him, in Selfless).
What's My Line Part 1
I Only Have Eyes For You
Becoming Part 1
Graduation Day Part 2
I Will Remember You