To wade in to the 'Rhythm and Movement' debate, I never really disliked them even when it was acknowledged that was the rule. They're well-shot, they have a unifying tune (albeit a completely unremarkable one), and the people involved are clearly extremely talented. My favourites were always the most frivolous ones - 'Festival', 'Hip Hop', 'Haka' (which was filmed fairly close to me, albeit still quite far away) and the late-introduced 'Music Video'. Obviously they were going to be a downgrade on the balloon, but in a way they were actually an improvement, as it meant the BBC didn't have to continuously rely on the globe as a symbol every single time they rebranded. I did like BBC Northern Ireland's take on 'Skateboarders' after they beat England 1-0, however
ITV1's 'Emotions' idents, on the other hand, were dreadful. I'm sorry, but they felt like adverts, not idents, and you could almost smell the marketing agency scent behind them. The only one I thought was decent was the Sport one, but that obviously didn't get played as much as the others. In fact, they look suspiciously like the sort of thing you'd watch before being rendered into a food substance a la Soylent Green, only more boring. Their replacements were much better, but then again I loved the 2013 rebrand so I think I'm quite out of step.
My wildcard is Channel 5/Five/FIVE/five/C5's look between 2008 and 2010. They weren't thought of as particularly imaginative at the time, but there was a lot of creativity in them, and they were generally just quite fun and interesting to look at. There's not many other ident packages I've seen that could have a town made of jelly, or a man playing the accordion with some trollies, or two invisible people fighting each other, or a chair eating a fish, or gasometers being played as drums, or someone playing the guitar with traffic. They were genuinely good idents in my view, and although C5 have gone up and down since - the look that replaced them only included one sodding ident anyway - I don't think they've had a look as good as this.
https://theident.gallery/five-2008.php