I like to mix them up. 16/8, omad, 17/9, 18/6. There's only 24 hours in a day so when you do an omad, it can morph into a 12/12 if you try to get back to normal eating times... if that makes sense. < and to me there's no problem in that one longer eating window as it balances out to get you where you were.

Just do the best you can and always try for the large fast being longer than the eating window. For me a log helps.