Hmm. I feel an essay coming on. Here goes ...
IRIdiot - I didn't find that SSRIs hampered the creative process for me; in essence, I am as up and down as I've always been. I have the attention span of a coked-up squirrel and so I tend to flit between one thing and another - but as a general rule, I'm usually working on at least one thing. Like many people have mentioned, my lower phases mean that simply getting out of bed is a mission, let alone turning on my computer and bringing myself to write anything; and when I'm more hyped-up I want to run around, put kitchenware on my head, get incredibly drunk and sing 'Finiculi, Finicula' in quasi-Italian from a tree-stump - again, not sit down and write. My head's a mess of creative thoughts at times like that, but it's jumbled, garbled and very difficult to channel. However, the meds I'm on haven't really stopped me from being like that - they've simply made it easier to manage panic attacks and depressive moods.
Satnin1981, once again, I can't congratulate you enough for overcoming your difficulties and channeling them into a work others can enjoy and take something from. What sort of setting are these loosely inspired characters in? I play in mostly fantasy based ball parks, myself - I get enough realism every time I check my balance.
Joan and Bippy (I'm overwhelmed with the sudden desire to call you 'The Bipster', but I won't), I see exactly where you're coming from and I've been the same myself. On occasion I'm able to dredge up the motivation maybe just to read a book, and lose myself in another world for a few hours - and then, just maybe, I can muster the energy to read back through stuff I've written and realize how much I enjoy it. I find that getting the enthusiasm back can be enough to drag you back up out of that swampy, miasmal black quicksand that is bummed-outedness and get you feeling productive again - and so while negative feelings like that can bring you crashing down to unproductivity, it can work both ways.
Pando, I see exactly what you mean by the colourful highs you get which inspire you to be in front of a camera. It's great being able to get something productive like a modelling career out of those highs because, as you said, it's near enough impossible to set your mind to anything while you're buzzing - so why bother? If everything's bright and colourful just enjoy it. You need to be in that mindset where you're uninhibited enough to jump into those (very snappy) clothes and get in front of a lens. I wanted to do life modelling a while back, but I don't think I would have been able to keep up the confidence without getting drunk - and no-one's artistic when they're drunk.
I love the tats, by the way

And the painting's coming across really nicely - I can't really tell from the photo and my abysmal screen resolution, but is it acrylics?
[Right, coffee break. I told you.]
Monochromeprincess, I love a lot of that candid and twisted imagery you've got going on. This is why I asked the question initially, because it fascinates me how people channel these feelings. I have never even once written a poem like that - mine tend to be about wrestling with shopping trolleys in an empty street, or totalling an Audi A6 with a binbag I threw over my back garden wall in a medicated stupor, or my fiancee's cat mating with my boot while she was on heat. I think it's because the more absurd side of day-to-day life provides a nice escape for me - a reminder that not everything is grey, dull, insipid or hostile. Instead of venting the angst, I try and replace it with something altogether more accommodating and let it dissipate of its own accord.
I've been thinking about how I'd answer my own question, and I think I agree with what the Bip... Bippy Bear said. Most of the characters I come up with tend to be inherently troubled in some way, even if it's only being marred by a slight imperfection; and then I veer into extremes very often, with hopeless alcoholics and drug abusers - I even have a bi-polar superhero on the cards (yes, I write, draw and foremost read comics.) However, I find it amazingly therapeutic to come up with stunning alien environments, tranquil fields and groves, sprawling tundras and the like, which don't have a shred of hostility about them.
It's such a long post and I don't know how to wrap up. I guess it's going to have to be musically.
Dum badum dum dum - DUM.
There we are