I generally go at the money or only a pinch above, about 3-4 months out. It gives you a whole lot of premium. This isn't the conventional wisdom.

Worried about the stock getting called away?

Two answers
(a) If so, you shouldn't be writing calls : )
(b) If you close the position before expiry, they won't be called. It's 99% certain that nobody will exercise a call if they can instead sell it for more because of time value remaining at the bid, which will remain true for quite some time. If the rally is continuing, you can close the position and roll it up and out to something with the same premium. This buys you more time for your price weakness theory to come true - if it ever does.

I've written a lot of Berkshire calls, and I don't recall one ever being exercised. Maybe I've forgotten, but normally I roll them if they're in the money, or let them expire worthless if not.

Jim