I'd recommend a mechanical keyboard. Mechanical keyboards often tend to be solidly built, have a reassuring clickety-clack (you can choose switch types with different characteristics btw) and just plain feel good to type on.
Your primary tasks when selecting one will be to choose the switch type (mx-brown, mx-blue etc), any additional features you need (shortcut keys, n-key rollover) and decide on the manufacturer itself.
I have a Ducky Shine 2
and it's an absolutely fantastic keyboard. I'd recommend something of a similar nature - solidly built and has all the features I need. For example, one of the features I specifically looked for were shortcuts to a calculator, and other programmable option keys. A lot of mechanical keyboards tend to be minimalist in nature, and fortunately, the Ducky was an exception.
The model I have has the ability to turn off the backlighting, which is great, because I don't need a christmas tree on my desk. I noticed that some of the newer Ducky models are starting to look a bit silly though, with all sort of logos and stuff which are undesirable. I can vouch for the model I have without reservation however, having used it for a couple of years.