Tubus ti racks, yes plural, I have a Titan and an Airy, they have no added practicality that justifies them costing three times the price of the steel equivalents. Their only possible purpose is to allow Tailfin owners to think they got a bargain. In my defense... No I'm not even going to bother with the lies... I like them and that's it, I would buy them again.
More practical bling, to the extent of probably being my best ever cycling buys, are the 20+ year old Rohloff and SON hubs, which have outlived several bikes. I'm so glad I got the polished silver rather than the anodised later versions. It's really satisfying to get the Silvo out once every few years and polish them back to a mirror finish.
Back to bells, I like the clear note of a brass ping bell, but so many of them are IMO aesthetically ruined by ugly fittings. The Crane Mini Karen doesn't suffer from this, has a nice note which just hangs, isn't stupidly expensive, or too big. I can get a decent range in volume and it's easy to multi-ping. I do also like those big ding-dong bells, but they take up a lot of handlebar, get muffled when wet and on a sample of one, are very nickable.