I'm not sure from where you took list of competitions, but you haven't even included main tournament - CEV Champions league. Volleyball is quite big thing in Europe, offcourse, it's nowhere near to football in popularity, but in can compete with basketball or handball. Can't say that I follow these competitions very closely, but I turn it on sometimes or make few bets.
It's shameful that level of volleyball in my country is so low that now we don't have our nationasl team which would play in EURO or Wolrd cup qualifiers.
And from my experience, volleyball is one of best sports to play, either it's indoor or beach volleyballl. Also, there is another type of volleyball, haven't tried it yet
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https://www.youtube.com/watch?v=gFLUL5yUypcP.S you mentioned Hockey India league, do they really play ice hockey in India? It sounds exotic same as Jamaica bobsleigh team?