I go when I can, I'll go for stretches alone... then stretches w/my surf partner when our schedules align...

Could of voted for all of them, but last year the most times I went it was with a friend.

Alone most of the time for me for similar reasons as stated above:
With a wife, it's not always easy to plan too far ahead so more often than not, I go out randomly at ungodly hours and none of my friends will even pick up the phone at 2 am to fish.
My buddies consider dead-sticking in the middle of a sunny day fishing. They call what I do: lunacy.
That being said, I sometimes meet up with some friends of mine that are serious fishermen and we do our thing. But it's hard to accomplish that due to conflicting schedules and prior arrangements.
As someone said before, it sometimes get scary/creepy/strange at night and knowing you're not alone out there helps ease the tension. Hopefully, this season I can find some more fishing partners.

I always head out alone, but I usually run into another regular at my spot(s). Sometimes by pre-arrangement, sometimes they just show up on their own.

I don't mind fishing with others who know what they're doing. In fact, I prefer fishing with 3-4 guys who know the drill instead of fishing alone, because a yo-yo generally won't try to move in on 4 guys casting in a line, but might on a guy fishing solo.

I'm not at the point---yet---when I worry about my personal safety on the Canal.