Thought I might mention FZ here. There's a ton of bands and singers that I'm into and Zappa is one of those giants of music who I really dig.
Impossible to quantify, his music covered so many genres (and I hate pigeon-holing artists anyway), from rock to jazz to fusion to avant garde to classical - and he even had his poppier moments, too. Lyrically, some of the material is a bit suspect but if your sense of humour is in place it's unlikely you'll find anything offensive in his ouvre.
Like a lot of what I listen to, my journey to Zappa was started by another band (Genesis - their touring drummer, Chester Thompson, used to play with Zappa's Mothers Of Invention) and has also led me onto other artists like Jean Luc Ponty and Captain Beefheart.
His music lives on in the albums he's left us (I'm reminded of Frank Sinatra dying and the only person interviewed who didn't seem sad was BB King, who was genuinely happy that Sinatra had left so much good work for us to enjoy and through which Sinatra would continue to remain with us) and also thorugh his son, Dweezil, who tours his Zappa Plays Zappa show using musicians from Zappa's various line-ups.
Anyway, that's my little recommendation to my fellow forum members to have a listen to FZ. Impossible to say where to start as his albums are all over the place. If you like avant garde music and are prepared to be challenged, try Weasels Ripped My Flesh or Absolutely Free. If you prefer a good, pithy tune, you'll find plenty on Sheik Yerbouti and Overnite Sensation. If a good concept album is your thing and you enjoy the odd instrumental work-out along with accessible tunes and stuff that's more left-of-centre, have a listen to Joe's Garage.
I thank you!