I know you asked for residents/attendings, but as an MS4, I DID already choose anesthesiology, so I'll respond as it may be of some use.
Simply put, nothing is ever 100%. For me, it wasn't anesthesiology or die. I like the field, but could have seen doing IM, even general.
The cool aspects of anesthesiology (which made my decision) are (in no particular order):
1) a generally great group of people that seemed happy (as opposed to what we often hear on this forum) and generally content.
2) decent hours, though early and I realize this varies greatly with practice setting.
3) broad breadth of knowledge base. Involved in patients of all ages, and undergoing such a huge array of procedures requiring anesthesia. Also, the fact that you need to know the pharm (of existing patient meds, separate from any anesthetics) but you also should know WHY they're on what they're on.... So, you really do need to know your medicine IMO.
4) a sense of "Job Well Done" at the end of a long case, with a sick patient. This includes teamwork in the OR, despite sometimes crappy environments. But, I've seen a lot of GREAT relationships in the OR.
5) a reasonably lengthed residency, though will likely do a fellowship. It's longer than some, and shorter than others.
6) Anesthesiology has it's stressors, to be sure. But, they're more "acute" stressors. What would REALLY be tiresome over time is dealing with some of the BS that those in the primary care fields do on a regular basis.
7) practice setting. Though, arguably diverse, it's nice to be in/around the OR.
8) procedures are cool, although they get old like anything (from what even CA2's have mentioned..). also, the procedures are shorter than a surgical intervention. so, if attention span is an issue or the tedium of many surgical procedures is a turn-off, you should be o.k.
I could probably go on, but these are a few that come to mind that separated anes for me.
Good luck in your decision.
cf