Here's the scoop.
1. Early season, when they say bring your rock skis, they mean it. It's a VOLCANO. There will be lots of little rocks everywhere.
2. Mid-season. Could be a bluebird. Could be 40 mile an hour winds that shut down a lot of lifts while dumping powder everywhere. If this happens, forget the summit (they probably shut it down), and head for outback or northwest. Visibility can be super tough with the high winds, so bring the right goggles for that crap.
3. Spring skiing. My favorite time at Bachelor. Start at Cloudchaser, then work your way from east to west as the snow melts into perfect corn.

Things I dislike.

1. Waiters are consistently rude.
2. My one card doesn't scan like 1/4 of the time.
3. Locals who try to cut in line for the summit chair. Yeah jerks. I noticed, and I wasn't having it.
4. The summit is shut down probably 2/3 times I ski there. You need a bluebird day with a ton of snow for it to be open. When it happens it's awesome. Carve on Beverly hills or practice to slip turn in the Pinacle or the Cirque.

Also, it is a long hike from the parking lot to Pine Martin. If you can, park at Skyliner.