To blog or not to blog ...

Okay, so I’m being encouraged to change up the blog a bit and make it more of a regular outpouring of thoughts and ideas. Thing is, I’m not sure ‘out’ is the best place for some of the things that go through my head at times. 
Kinks and fetishes aside (*cough), how much of one’s personality should one exude to an online community? Given that certain displays of characteristics are acceptable, or would be if one was cute, funny or a lil quirky (even dry wit and sarcasm can work for those gifted in the arts), where do you draw the line? What about opinions. On real life subjects. On politics, or poverty, or war … freedom of speech, TV shows, movies. What about all that stuff? Does it have a place in the communication between reader and author, and should an author automatically become a blogger?
I toyed with the idea of starting a sister blog for the ‘thoughts’, but then wondered if having a list of blogs is worse than saying the odd thing on one that not everybody wants to read. Followers could, after all, look at the title and decide not to partake of the unfolding morsel of news. 
I’d be really interested to hear your thoughts whether a reader, a blogger, and author, or a bit of all of the above. What do you like to hear about from your favourite authors?
And please, please, help me out – twitter – I just don’t get it. I like to think of myself as reasonably computer savvy. Back in the day, I spent some time installing new software packages and introducing new working routines for a major company so I do know my way around a pc and I’ve been surfing the net for more years than I care to admit both socially, academically, and for work. So, why, oh, why, does the concept of twitter elude me? 
Maybe it’s the social aspect—I’m not naturally a people person. Are you on twitter, and if so, why does it appeal to you?