Long story short, I go to a non-target and spent a summer in consulting (MBB). Didn't like consulting, so I went through full time recruiting and received a couple offers from 2 BB's and a fairly unknown boutique that specializes in a niche market (think tech/media/industrials/oil&gas, etc.). I wasn't too fond of the BB scene and really liked the people and the industry they work in, so I ended up accepting the offer from the boutique. However, I'm regretting the decision more and more every day. I feel like lateralling will be hard, I've pigeon-holed myself into working at the boutique long-term, and I'll be missing out on the exit opps (access to headhunters and PE/VC recruiting).
Maybe it won't be as bad as I am thinking it will be and I'm only looking at the downside, but not the upside of going to the boutique. I know not working at a BB is not the be-all end-all of my career, and it's too early to be kicking myself, but I think I overlooked the benefits of starting a career at a BB. Did I fuck up big time?