I agree so much!! I've tried my best to like mechanical keyboards... but no, I hate them.
The noise is distracting, they require too much strength on every key, and they are big and expansive!
I thought I might have the wrong keytypes, so I even purchased key testers: the red keys are less noisy, but that doesn't solve the other problems. So I just can't find a reason to like them.
My favorite keyboard is the Thinkpad keyboard (TrackPoint Keyboard II Bluetooth 4Y40X49493): the island version (current) is more comfortable than the previous version where the keys were touching (SK-8835 family if you want a numpad) as it leaves some room for nails.
Mechanical keyboards seem preferred by gamers, but in my opinion, they make little sense in an office setting.
However, my new favorite mouse is the Logitech G600 that's popular for MMOs: after purchasing a few different mice that had been recommended here and testing them all, it's the one that fits the best in my hand, even if it's still too large (why can't they make smaller mice??)
What I like the most is how it has side keys that can be mapped in the firmware to physical keys (persistent setting) and to elaborate actions in AutoHotKey!
Now give me the same thing 30% smaller, wireless with bluetooth, with a left hand option, and I'd happily pay $200 for it!