Whatever it takes.
I have legal limit here, or easily over the legal limit if I wanted to. But I typically try to run lower power levels, sub 100 W, unless I just can't make it there.
At my listening desk in the living room (I monitor much more than I talk) there are 2 HF rigs, both 100 Watts, and a small amp, 800 W PEP. Most of my day to day ham operation is from that location and the amp has not been turned on in over a year.
In the radio room (converted spare bedroom) there are a few rigs, up to 200 Watts, and a couple of legal limit amps. I run in cycles with this gear, I might not touch it for several months, or I might use it weekly. It has been a couple of months since an amp was turned on in the radio room, and then it was for an AM net.
T!