I use semi-colons and em-dashes liberally too. But I tend to do a second pass to...

I use semi-colons and em-dashes liberally too. But I tend to do a second pass to avoid redundancy.

e.g. > [...] and there is - in my observational opinion - a rather dark and insidious slant to it

Let's leave it at "insidious" and "in my opinion". Or drop "in my opinion" entirely, since it goes without saying.

Just take one dip and end it.