For Hermannplatz I would argue that only one side of the U7 platform is beautifull. Kotbusser Tor, I wouldn’t call beautifull at all.
But there defenetly are some pretty ones! My favourites are the ‘new’ U5 sations and a lot of the U8 north of Osloer Straße.







Honestly the biggest problems with them are landlords trying to stop you from installing them.