Other things that can make people appear drunk or stoned...
... include, but are not limited to:
The initial onset of diabetic shock; has been mistaken for DD, DUI, etc many times, sometimes with tragic results;
Neurological disease - not likely to break into your house, but can cause loss of balance, slurring of speech, unintentional collisions with others. I bring this up because a female friend of mine in Florida suffered from one of the MD family of disorders. On bad days, she was often mistaken for drunk or stoned. You'd be amazed at the horrible assumptions people would make (well, maybe you wouldn't), and you should be disgusted at the judgmental comments complete strangers flung her way. If ever people deserved to be slapped for stupidity and sheer ugliness, they did on some of those occasions;
As previously mentioned, hypothermia - again not too likely in Florida, but possible in north Florida, especially on a wet winter night - if only because some people get caught completely off guard when the temperature drops from 70 to 40 in the space of two or three hours.
Fear; this could be caused by "poor life choices," in the form of the dangerous boyfriend. Then again, it could be caused by the friendly neighborhood rapist trying to chase an early morning jogger, or by somebody's unleashed dogs trying to chase an early morning jogger, etc.
Alcohol and drugs are other possibilities, of course. However, there are plenty of non-violent yet very stupid drunks.
Decide ahead of time that any intruder gets shot, and I think you'll find the Castle Doctrine isn't quite as expansive as you seem to think it is. At least, you'll find that the jury will have some say in whether a break-in that did not stem from criminal intent will qualify as the type of forcible felony that triggers Castle Doctrine protections.
And trust me, shoot some drunk, unarmed high school girl with no criminal record, without proving that she had otherwise threatened you in any way that a reasonable person would find threatening, and you will not want me on your jury. I'm pretty sure I'm not the only forum member who would feel that way, and I'm in favor of Castle Doctrines. Now try to imagine the emotional responses of jurors who are anti...