Lessons learned: writing really long fiction
I'm writing German science fiction novels as a hobby that are around 700-800 norm pages each and learned the hard way that at least in the German publishing market there are virtually no program places for science fiction, very few agencies accept manuscripts in that genre at all, and publishers rarely accept novels larger than 400 norm pages from a first-time writer.I'm currently sitting on 8 manuscripts - two of them are actually 1400 norm pages each. I'm writing on my ninth novel now and will one day give away all of them for free. The problem is that correcting and finalizing them into book form (e.g. typsetting in LaTeX) takes too much of my spare time.I'm just writing this as a friendly advise. At least for smaller markets like the German one, do not ever expect to be able to make any substantial amounts of money from your writing hobby. The trend is against it, and it's much cheaper and less risky for publishers to get a successful US writer translated than to accept a new local one. People are also reading way more English originals than they used to. Besides, agencies are looking for urban fiction, "novels for young women", gift books, etc. (Before you ask, agencies have attested  me that the quality of my writing is fine, but what they say and what they think are two things and this may also play a major role.)Of course, it's still my favourite hobby. Once you start you cannot stop. I don't think that any particular lessons can be learned, because everybody writes in a different way and under different circumstances. The bottomline is that it's not hard to write a lot. ;)