Regular sales vs Summer/Winter Sales

I do think summer sale is the best.

summer and winter are the best, except sometimes regular sales have price glitches and weekly sales sometimes give high discount on A-AAA games

I don't think it will be chraper during winter sale.

i get the feeling that such a steep discount on Oxenfree might indicate that it might soon be (Humble) bundled
i take no responsibility if this gut feeling turns out incorrect

Sales have been getting worse for a few years. If the difference between 75% off and (say) 90% off is only a dollar or two I wouldn't wait.

There is no difference for some time. The sale prices are always the same. If you really want to get a game cheap, then Steam is only good if you are in the cheap locked regions. If you are ROW, it stopped being the cheapest store a good while ago.

After the introduction of steam refunds and the removal of flash sales, the winter and summer sales are about an increase chance of higher discounts instead of a guarantee or expectation.

Is it always the case that winter sales are worse than regular sales ?

The lower sale for Oxenfree during the summer sale has nothing to do with it being the summer sale, it was because the game was newer. Usually the big sales will give you discounts that are in line with what you would expect on a regular sale for a game of that age.

There's no solid rule, lack of daily/flash deals makes publisher not want to give big discounts, as they'll have to be same for 2 weeks plus there's bunch of pc players going completely dumb during Summer/Winter sales so they actually give worse sales than during Midweek/Weekend deals, because they think "morons will buy it anyway".

you never know.
if you plan on playing it now, buy it and be done with it
if you want to add +1 to your library, go get a burger :D

The only big difference between seasonal sales and regular sales, is that during seasonal sales there's a wider range of games on sale.
The amount of discount a game gets depends entirely on its release date: newer games are unlikely to be heavily discounted.
Also, during Summer and Winter sales, there're holiday card sets, with the relevant cards dropping in place of coupons when crafting badges.

Personally, I waited for this year's summer sales just to see most of the wishlisted games to get the same price drop as in the past.
So, from now on, 75% or more is always a good discount, depending on how much I may want a game.

if you dont want to start immediately playing it, dont buy it. you will regret it.

Thank you all for your answers. Based on them, I think I'll wait.