Never be embarrassed for the music you listen to. Some of us genuinely enjoy listening to shitty house music outside of work :)
I also recommend death/folk metal. It's very high energy, and while there are lyrics they're generally unintelligible or in another language. Equilibrium or Wintersun are good starts.
I'm of a similar opinion. My 'work' playlist is almost exclusively trance music and black metal. Both are repetitive and don't demand your attention, great for concentration.
Xasthur, Nortt, maybe Blut Aus Nord, and a bit further out in various directions I'll say Portal, Aluk Todolo, Jesu, Vuyvr. Should be something in there for you, and there should be plenty of samples of stuff you haven't already heard of on the youtubes.
I also recommend death/folk metal. It's very high energy, and while there are lyrics they're generally unintelligible or in another language. Equilibrium or Wintersun are good starts.