I 'spring' clean this time every year, and I am 'one of those people' who could not live in my home if I didn't do it annually.
All walls washed, all curtains down, washed, starched and ironed (windows washed in and out), all beds stripped to the mattresses, all upholstered furniture steam cleaned, all carpets steam cleaned (although now that part often takes place more in the summer time). Every light fixture and ceiling fan dismantled and cleaned, all doors and baseboards washed, all things that sit about, be it a lamp or a knick knack etc washed and cleaned.....Not a surface left unwashed!
Some rooms are dirtier than others. And since we are empty nesters, some rooms get a more quick clean (we have one bedroom that no one ever goes into or uses, so I'm relaxing the tear down in there to every other year for now).
I start late January by going through every cupboard, closet and drawer and purging first, then move on to the real cleaning.
I will say I'm getting slower and slower at it. But it needs done, it's a very satisfying feeling when it is all done. Takes me about a month or so from beginning to end these days. I'm amazed that I used to get it done in about a week back in the day when my body still worked (LOL).
We have way too much outdoor work come spring, summer and fall, so I take advantage of the Ohio winter to get everything inside up to par.