Ya depending on the lift I'll do a warm up set. Like squats, deads, or bench. Other than that, most other lifts there's not that much of a need to "warm up". for those other lifts - like Freek, I usually do around 60-70% with for 12-15 as well. Just to get the blood flowing!

But yes of course, everyone is different and have their own preferences.

Cheers