What's a language you were once biased against fanatically, but ended up really enjoying writing with?

Any Spacemacs users here? I'm debating a switcheroo from sublime. I know my way around vim, so general usage shouldn't be a problem.

I'm more interested in the long term use. I guess since its just some kind of emacs layer, it should be pretty fucking stable for the foreseeable future, but how is the plugin support?

I'm currently doing React at work, and a couple of other Node side projects. Syntax highlight should be sorted out for me. I would like to tailor it somewhat for productivity, like a good file explorer, integrated terminal and other auto tidbits like auto brackets, auto close tags and whatever else. Any good tips on plugins for me?

Also, looking for a nice color theme.

Yo anyone recommend a software KVM switch between mac and linux??? The switcheroo is getting annooyinng.....