Agreed, this will be a big thread....
My collection is sizable and I rotate a lot of them, plus it depends on where I am and whom I am with.
At the moment I reach for three fallkniven TK2, knife research Rasul, and the benchmade pukko 200
The TK2 is brilliant in the kitchen...
When I am in a woodland with the family, I have a whistle, small fire steel and a opinel no 7, around the neck.
On my next bushcraft course I will likely bring my mark hill Woodlore, or the bark river aurora 2. With a Mora Companion HD as back up.
In all of these cases, I will also have a multi tool, either a swiss tool or charge/wave/surge/mut.
Apart from the moras and multi tools, I try not to double up on blades in the collection, but the benchmade pukko 200 I have 2 of, as it is brilliant.....and my most carried blade, apart from a multi tool.