Quite often my lazy / fussy brain comes up with nothing more edifying than 'huh!' or 'mm, so what?', though, and then I feel annoyed at the artist. It's a bit of a failure of the notion of conceptual art if the concept is a dull or poor one. At least with traditional art you can admire the technique, symbology, references etc even if the subject doesn't engage you.
brain struggles to explain it and sometimes comes up with
(Paragraphs look fine to me.)