Depends-
If I just want music, any music, tuner
If I've just come home from surgery (which I did yesterday), that's LP time.
If I'm feeling like I don't want to flip LP sides (especially on my 45's) I'll go for CD
Certainly, though, there's a lot of music I have that I only ave on CD
Regardless, I enjoy all 3 formats.
As for buying music, I like to stick to originality. If it was originally issued on vinyl, I seek out the vinyl.