I used to about 10 years ago, but one day I was bouldering with a friend and he took a freak fall of about 3 feet on the easiest part and screwed up his ankle for months. If I was not there to help him hobble out he would have been screwed I really try to avoid going alone these days.
No, I don't. But mostly because it is really not fun. There is a good energy when a bunch of people are working on the same problem. Extra crash pads and spotters are nice, too.
And I've never had a situation where I wanted to go somewhere, and couldn't meet up with other people.
I don't boulder much but I used to do a lot of solo climbing (lead and TR solo) and while some of my favorite climbing moments ever were when I had a crag all to myself, I couldn't reconcile the risk with my responsibility as a parent. As with climbing in general, striking that balance is something I continue to re-examine and change my mind about. For now, I only climb solo when I know there are others at the crag.
I found when I boulder solo it is peaceful, but I miss out on the conversation in and out of the location. I have found I climb socially so boulder, TR or lead... I would rather have my wife with me (who luckily also loves climbing).
I've bouldered alone quite a few times. When I do I stay to a circuit of familiar problems or low-balls I never project without a spotter. I usually do this early in the morning and tell my wife exactly where I'm going and what time she should expect me back and also the time she should come drag my carcass out so the bears don't eat me.
I boulder both solo and with friends. Both of these "disciplines" have its own beauty. Sometimes its really nice to be alone right? (not only when bouldering)...and if you are in some beautiful place with rocks/boulders its even better. Obviously you need to take care of your own safety, nobody will carry your crashpad/beer/corpse/etc.
...take care you guys risking your lifes out there:)
Sometimes I boulder alone and sometimes I boulder in groups. Certainly I can push it harder when I'm out in a group.
At times, though, I'm in the mood to enjoy the solitude and peace of bouldering alone. However, I always take the dogs and (since the hip replacement) I always take a few crash pads.
Only on low roofs or something within means of landing on a pad. High balls I will attempt with my buddies or near by boulderers. But since my injury from crossfit, I really haven't bouldered. I have missed it.