Just hit 70 on my first character last night. I'm guessing the game is really just getting going now.
My gear is still all sub-70 stuff. I am currently playing on Expert, as that seems to be the best speed/risk ratio.
I guess the best plan is to keep doing bounties and rifts to gear up?
Here is my profile for those looking for a laugh :P
https://us.battle.net/d3/en/profile/.../hero/46243582
SNEAKY NINJA MOD EDIT: It's also fun to find a good weapon with level reduction on it and use it to power level other characters. Nothing like being a level 45 guy running around with a 2000 damage level 70 weapon.