Do you put any weight on any factors beside the technical capabilities of the tools you're working with? Like, say, how easy they are to pick up or use, etc.?

Do you put any weight on any factors beside the technical capabilities of the tools you're working with? Like, say, how easy they are to pick up or use, etc.? The way your comment reads, it's like you're saying you'll never hire someone who rejects speaking to you in Esperanto unless they offer a good critique of its grammar.