Their current EULA is pretty much legally identical to the one Steam has and everyone loves Steam.

Anthing EA can do with your data these days so can Valve.
Quickly scanning through Steam's EULA (which hasn't been the subject of 1000 articles querying it) doesn't mention scanning your machine or uploading details to a 3rd Party(s). You can opt-in (prompted) to send anonymous hardware details if you want though.
Origin (on Mac at least) allows publishers to have their own DRM with no need for Origin to even be running to play the game. Steam requires Steam to run in the background. Origin also can sync your save games between Macs, even games which don't have origin built in!
Steam is required to install games (obviously), but there's plenty of DRM free games. DRM is a necessary evil apparently, and I suspect one of the reasons that "everyone loves Steam" is because it's done so well on their platform... As well as permanently binding games to accounts and syncing settings etc
All stores have their pluses and minuses but if you remove the Internet rumours and speculation and look at the Mac Origin store it has some real nice touches. Sure they have had some fairly public issues in the past but nobody is perfect.
Yes... lets ignore their past and their present, pretend it's all just a rumour (how could such a big, successful company do anything naughty?) and look simply at their application store front (which is poor compared to every alternative I can think of anyway!).
Yeah, the arguments work both ways

But Valve doesn't have a horrendous history of buying up game producers etc. It's a not a huge office full of accountants, it's an aspirational, start-up-style place to work for where everyone works on what they want when they want. The store is 'just a store' (done well?), but Valve themselves are pushing for platform independent games and still support and port their own archive. They're still a business, they're most likely doing it so they can create their own gaming platform, but I honestly think that it is absolutely amazing work/news for anyone that plays games - Especially mac users! Little indie producers creating games that are native to Windows/Mac/Linux/etc is great, but to have someone like Valve doing the same thing could really change things (more than just gaming in the long term?).
I've just reread this and I hate you

I really couldn't be more anti-brand loyalty/hatred, and the above couldn't sound more X vs Y fanboyism! Most of my passion regarding this is caused by a love of OSS, I've spouted enough though.