1. 24-105 f/4. If I had a f/2.8 in this range, then I’d go for that instead. Versatility in focal range is what keeps me going back to this one. For now, in low light situations, I just crank up the ISO.
2. 70-200 f/2.8. If it’s one or two people. If it’s a group, I usually revert back to the 24-105.
I just haven’t got the feel for the 50mm f/1.8 yet. I can’t ever seem to nail the focus at such a narrow DOF, I can’t get a decent landscape photo at 50mm for the life of me, and I can’t stand moving backward and forward to get the right framing.