I have spent a good deal of time going through the myriad of highly informative posts here, but I still have a few questions about NavCanada. I'm assuming mostly "all stars aligned" conditions here, but if you must, do indeed yell regarding any imperfections in the system

1. Entrance. What methods are there to get into it? I know of the site method, but are there others? If so, what are the advantages/disadvantages of each?
2. Facilities. To what extent can you choose which kind to work and where? I've gotten the impression that IFR is mostly based on the region in which you are in, but that otherwise for VFR/FSS/FIC they pretty much throw you anywhere they like. Similarly, how would you go from one type to another at some point - Any constraints?
3. Within facilities. This is a big one. Assuming you are within a facility that you want to be, how do the often called "pools" and "bidding" work? Do you pick which speciality you want or does it depend on where you are needed or what chunk of sky you can handle the best? Similarly, how would you get out of one and go into another - Any constraints?
4. TCU's. The impression that I got is, that there seems to be some level of pseudo-hate for them, due to what sounds like the lack of ability to work them, and thus lower levels of people available...thus more working hours, etc etc etc. Anyone able to clarify what exactly goes on?
5. Pay. Obviously it's difficulty-scale-based. The question is, do all the facilities(From a certain type) follow the same scale, or is there a scale for enroute, a scale for terminal, etc?
6. Time frames. On pure average, how long do the steps take, going from the very first "application" to fully certified.
Anything else that would fall along these lines is appreciated too.
Thanks in advance...