Yeah, I know, I was just speaking generally; bipolar is totally different to AS in regards to emotional difficulties.
No life, no meaning, no joy, etcetera to a feeling of life, a meaning, joy, etcetera, is a good way to put bipolar--depression to its opposite. And like any disorder, there's varying shades of severity.
I have a cousin with bipolar, and she's quite "disturbed" due to her disorder; when she's up, she's really, really up ("manic" would be a good way to describe it), and when she's down, well, she has the scars on her wrists and the million and one inpatient visits.
When I'm "down", it's usually due to an external reason, a cause that's immediately evident; even with no cause evident, it's easy to see why I'd be "down" due to past events and the difficulties that autism places on someone in this society.
With regards to anxiety, that's pretty much the only emotion I constantly feel; I've felt such since I remember feeling for the first time. This is common for people with AS due emotional disturbances and sensory sensitivity.