m0useanswered grow question 1mo ago everyone is diffrent.
If you mean the seeds in a pack of any pitcular strain. I look at the most robust ones. Colour, Size, Shape and density all play a role.
If you mean by what seeds you pick for the strain of the plant vs others, so may factors. Genitics, Brand, Breeding, Height, Smells, Terps, cannabiod %, Special traits,
Just way to many to list. also Auto vs Photo vs fast.
I would start with if you want an auto or photo, ignore fast flowering its a gimmick unless that fast version has a better terpene profile.
Then ask yourself. Indoor or outdoor. then Indica Vs Stativa Vs Hybrid.
Go from there and look at what pops up on your seed back of choice. and narrow it down. Lot to choose from. I like the very strong smelling ones. high terps, low THC.