I use Favorite for two things: to acknowledge someone's tweet ("Ha! Clever! Saw this! ACK!") and to flag things for later reading.
Needless to say, neither of those is meant to be shared. I am not interested in my Favorite items being added to my stream, nor the Favorites of others showing up there. Unless, in either case, it was intentionally Retweeted.
Please pull the plug on this experiment, or, at most, make it an opt-innable option (both as sender and receiver).
(And, yeah, I'm posting this on G+, but it will mirror to my blog, thence to Twitter.)
Reshared post from +Gizmodo
Twitter Tests Turning Favorites Into Retweets, Frustration Ensues: http://trib.al/oXdCbQJ


Sounds kinda like what Google did with its +1 system. Also stupid.
In Google+'s partial defense, it can be opted out of and is only an occasional thing, not every +1.
There already is a way to see other people's favorites (the activity stream). No one uses it because it's lame.
I've started using the collections in Tweetdeck to collect posts for later perusal. That way it stays totally private.
+Dave Hill only partially. You can opt out of seeing others +1s, but you can't affect how yours are used beyond making them all anonymous. At least that is how it was last time I looked.
Even if you could, the idea is still stupid because the reshare button is literally right there. Being less forceful about stupidity doesn't change that the original thing is stupid.
Yay, no privacy. Everybody cheer.