I've found Nike products to have better quality over Adidas. Although, probably the most comfortable pair of shoes I've ever slipped my feet into is a pair of Reebok's.
As for Nike vs. Adidas, I really just buy whatever looks good and feels good when I am shopping. Recently, I have purchased more Nike shoes than any other brand.
Nike.
I do buy an occasional thing or two from Adidas but its mostly Nike for me.
Its not really a preference for the brand, but whenever im in a huge sports goods retailer i find myself drifting towards nike products. I guess i like their designs better.
well when i played soccer,
i had a pair of Adidas predator mania's and a pair of mercurial vapors and the mania's were amazing, vapors garbage. i allways wore my Adidas and occasionally the vapors. i mean i spent 300 on each and i barely wore the vapors.
i do have a pair of Nike soccer shorts i love though.
but, Adidas all the way.
but for running, asics hands down.
I like Adidas for everyday shoes, but if I'm paying full price for athletic wear, I prefer Nike because they have the Livestrong line. So if I pay full price for something, it's nice that 100% of the profit goes to a great organization.
i dont have a preference really.
my running/workout shoes are a pair of nike+ shox
my football cleats are under armour..
my workout gear is under armour and one nike sparq shirt.
and my daily shoes are my dc's or vans.
In general I'm an Adidas person, but the best set of Soccer/Placekicking spikes I've ever owned were Nike's.
That being said, I'm pretty sure I have Shoes, pants and some sort of shirt from either brand. Head to Head, I'm a little partial to Adidas. Their shoes last forever and my Sambas are absolutely great!
nike is my favorite brand for workout clothes... comfortable and cute!
for workout shoes i'm all about new balance and until this weekend i wore new balance running shoes, too... however i decided to give nike shoes a try.... we'll see...