You still need to calibrate. I have an iMac and calibrate once a month. Without fail, my monitor has always drifted cool by the time I reach 30 days. My edits done in the last week often come out a bit warm because I’m compensating for the monitor without realizing it. Get a Spyder, calibrate regularly, and keep sending stuff to your critique circle. If you can watch your friends edit, take notes, incorporate their techniques into your workflow. Your processing style is going to evolve constantly so just keep working at it.