It would probably look like you didn't exercise enough restraint. The eyes need a place to rest.

I have seen many rooms posted here, taken from magazines that pulled it off. To each his own!!!

Check out the Barnes Foundation. But note that there is a reason for the groupings, too, which is to illustrate elements in the paintings/art for art students. So if you choose more gallery-style walls, then try to group with some purpose in mind. Here are some of the Barnes rooms.

https://www.barnesfoundation.org/whats-on/explore-the-barnes-online

It all depends on the space, pictures would help.

sushi, I love the Barnes! I visited the old site in Merion a few years before it closed, I haven't been back to Philly to see the new building.

Depends on the art you are using.