I use the Jim Dunlop .60mm for just about everything (mostly using the side of the pick rather than the tip)
On acoustics, if it's extended strumming or hard strumming though, I'll switch to a lighter Jim Dunlop .38mm using the tip.
For extra texture I use DAVA Control picks by Dave Storey. He also makes a multi-gauge pick that lets you adjust the tips flexibility depending on how hard you grasp it. So you can use it for both leads and strumming.