it doesn't always make me feel energised
Same here...I always thought that writing everything I want would always leave me relaxed, but there are times when writing becomes a chore for me. Yes, I do have the ideas, but putting them in words and arranging them sometimes felt dragging. It's like my brain wants to just dump a lot of ideas, but it ended up having difficulty translating them into intelligible group of words.
Unlike my notebook diaries and journals before, where I can just rave nonstop without a care, sharing my thoughts here felt more like a challenge because it isn't like a one-way sharing, but rather it's more like an attempt of me interacting with other people. Like you said, there's no perfect communicator, and even though I check my post a lot of times before I share it here, it doesn't always guarantee that everybody will get my point. After all, we all have different views and not all are able or willing to understand my opinion.
It isn't a chore for me, it is more that it takes effort to think and often, there is some kind of emotional investment also, as I write straight from my life a lot.
And I think that this can be a good thing, because it can create the discussion- I don't like reading things that are "too complete" without room for the audience to make it their own. Too many think it has to be a thesis.
That too, it's also interesting to know other people's views because it does sometimes become an eye-opener for me :)