Ranking of the dangerosity of common solvents

I wonder how bad are common solvents I used everyday in the lab. Like is DCM worse that petroleum ether? Ethyle acétate vs MeCN?

For example, I take many precautions with DCM, and not so much with alcanes but dont know if it's the right way.

What do you think? Maybe a little informal ranking of solvents could be useful.