Pre the DLC, I would make sure I did the daily in an attempt to get Ascendent Material to level up my armor and weapons. Post DLC there's really no point to do the daily missions especially if your weapons are already maxed out and you have the new Raid Armor. I haven't done a daily in a while and the only time I do is when one of my friends is doing it, but I just usually join for the conversation
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nope, only when i need xp an its a super easy one like the vex portals. post-dlc they only choose the longer more involved missions and why would i care to get ascendent materials?