"Are you a libertarian? Libertarian (big-L)? Left-anarchist? Market (right)-anarchist? Constitutionalist? Or something else entirely?"
In general I'm very skeptical of all political views since most people believe something because it's what their parent believed. In general I reject everything to begin with and work my way towards firm views by proving them to myself first logically and then with real world evidence and finally I try my hardest to break the theory down to prove that it's wrong or can be wrong in certain situations. If the view can withstand these tests then I will incorporate it into my political belief system. An example is lowering the highest tax bracket (when it starts out being pretty high) has shown to increase the fed's revenue and I've proven it to myself with pretty simple economic reasoning. There are lost of things that I 'think' are true or are 'mostly' true but I can't prove in all cases, these are the types of things I enjoy discussing in order to discover what is the best solution. This leads me to be even more harsh and critical of my own current views than the ones I oppose so that I can find a way to make them more logically sound. This is of course because it is EXTREMELY hard to find a liberal or socialist who has given any intellectual thought to their possitions. At every opportunity I try to engage a left winger in a very polite intellectual conversation about a certain issue and 90% of the time they get REALLY angry with you (mostly) or have no responce to what your argument is, I seriously like socialist/communist more than most liberals because many liberals are SO intollerant of other people's opinion and are just so angry and hateful to you if you dare to dissagree. Anyway this criticism of my political views seems to make me one of the least libertarian people in our community on lots of issues. Not because I dissagree with certain issues but because I present arguements against them that prehaps I haven't resolved. Still I think I am quite libertarian or anarchist because ideally I'd like there to be no government. Problem is I haven't found a logical way of making this possible in a pracital or theoretical sense. In constructing a theoretical world with no government I've only gotten this far: Everything would be contracts, and contract disputes would be judged by a jury (no judge) and the courthouse would be paid for by the looser of the contract dispute. A company would run courts off of this revenue.
Essentially this would give rise to competeing governments that you could join by signing a contract with them. These 'governments' would act kind of like trade associations, or fraternal organizations where they look after your interests (or not depending on how much you pay). Still there are huge problems with this theory I still need to resolve. One drop in the bucket is if your address and phone # is private information, how can the 'court' company make a random selection of the population to make up the Jury without having everyone's information?
This doesn't even scratch on all of the economic situations that are 'natural' monopolies, comodities that are non-excludable and the comodities that (I forget what they're called) have no marginal cost. Roads, utilities, radio waves (beaming into YOUR house without your permission!), airplanes flying over your yard, neighbor's yard breed pests that infest your yard but you can't prove it, giving citizens nuclear weapons, eminate domain, required car insurance?, debtor's prison?, indetured servitude to pay you debts?, children's right? so many problems that I don't know know the answer to. But alas I have rambled now for an extremely long time!