Recently during both my play throughs of Deus Ex: Human Revolution, I used a hybrid of both gameplay styles. I like to call it "ambush style" gameplay. I'll sneak in to an area undetected. I'll plant some C4 in an area that a lot of enemies are walking by,
then I'll move to the other side of the room where I wait for some enemies to enter the blast radius, then I blow them up. Which causes the other enemies in the surrounding areas to come running to the site of the explosion. And once they are all there, I
pop out and start shooting them in their backs with my assault rifle. Hence, ambush style.