Likewise, it's a fantastic city. I lived there for the best part of two years pre-Covid, and had visited enough times previously. No pretence, not quite the 'hip' place it was a few years back (and that's a good thing, as far as I am concerned) but it has something unspoken that makes it unique. I can understand why someone would think it 'grim' initially - the architecture and apparent open, desolate spaces can give that impression but easily found one layer down is loads of life. I miss it very much.
Cologne and Hamburg are great too, imo, but they don't give me what Berlin does.