Please consider making tag clouds with variable layouts and forms. Python has something similar with [5]

The problem is that there is right now no layout specifically for tag clouds in Roassal, it uses quite generic algorithm (RTRectanglePackLayout).

If anyone is interested in this topic, today I also stumbled upon this http://static.mrfeinberg.com/bv_ch03.pdf

[5] http://sebastianraschka.com/Articles/2014_twitter_wordcloud.html

Peter