This is a bit like asking what’s your favourite car? Digi-Key offers 39,624 varieties and obviously the details of the application may eliminate some or many. That being said there are now many low cost options with rail to rail inputs and outputs, low offset, high drive capability etc. Further for many applications state of the art specifications are simply overkill.
I prefer working with the SOT versions, small enough for most applications and easy to hand solder. When I include active, in-stock and wide supply rail, 39,624 becomes 10 and then <$1.00 becomes one, the NCS2007
So what’s your favourite go to op-amp(s)?