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I have noticed that the word cloud includes common non-significant words like: "Thank", "post" and "think". Maybe they should be excluded.

Actually, it's not that bad that it shows thank as your biggest word. It shows that you're a grateful person.

Moreover words like "think" and "believe" could be interesting for writers. If they pop up too much on the word cloud, the writer needs to pay attention to use them less, because they make one's writing weaker.

So, this can be a parameter for the user. Just an empty text box, with the option to populate it with common words like you mention. And the user could have the option to add extra words to be excluded. Eventually, this text box could be prepopulated with a standard list.

Yes, I agree.
Including those words was useful for me. However, if someone else wanted to know about my interests through this word cloud, they should be excluded. So:

this can be a parameter for the user. Just an empty text box, with the option to populate it with common words like you mention.

That's a good suggestion. Here's the list of words I currently have ignored: https://github.com/evanmarshall/steemit-cloud/blob/master/src/ignored-words.js

I think that you should exclude the following words too:
thank
think
please
moreover
maybe
soon
like
liked
used
already
keep
instead
example
really
give
btw
post
lot
away
around
issue

Yesterday, we had a talk about the friction to go to another website. Today, I realized that I check my steemd feed way more often than steemit feed, because there are no notifications feed on steemit and steemd acts as a notification feed.

If a decent discovery algorithm for Steemit was implemented on another domain, even on a webpage on another domain like your tool above, and it opened the Steemit posts in new tabs, I'd definitely use it as my start page for my steemit browsing.

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