Personally, I'd like the Challenges to be a challenge, rather than a grind. I'm enjoying the mix for the daily Challenges, but something more like "Get 28,000 points on a game of Score Attack Matchmaking" would be more interesting than killing 50 dudes in Firefight. It's been a month and it feels like we've seen the extent of the variety (though the Campaign daily challenge from a few days ago - beat a mission with three skulls on - was more up my alley).
I generally do a couple challenges every day, and they do motivate me to play. But they're not challenging for the most part, just "play for a bit" kind of motivators. The weekly's have become "play a LOT" rewards. Which isn't a challenge, it's a grind. I'd like to see more of a mix. They've got the potential to encourage players to try and do things differently, such as the Campaign ones so far, and those are the ones I enjoy the most.
I generally do a couple challenges every day, and they do motivate me to play. But they're not challenging for the most part, just "play for a bit" kind of motivators. The weekly's have become "play a LOT" rewards. Which isn't a challenge, it's a grind. I'd like to see more of a mix. They've got the potential to encourage players to try and do things differently, such as the Campaign ones so far, and those are the ones I enjoy the most.