Obviously if you want to observe proper batting and bowling techniques, then you should watch test cricket. The strategy with T20 is monotonous. The batsmen try to smash as many runs as possible and they don't care much about building the innings or even to take singles and twos. But if that is what the fans want, then the ICC should listen to them.
I cannot call it the evolution of the game but it is good to see so many variation of the match and i think only in cricket you can find this much variation, Test matches, 4 day games, ODI, T20 and now T10 and none of the other sporting events have this kind of formats in a sport, the only thing missing here is mixed matches were ladies can play alongside men like we have in tennis mixed doubles
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The last thing that I would like to watch is a mixed gender match. Being a female, I would say that cricket is not one of the domains where females are capable of competing against the men. The salary of the female players have risen by manifold over the past few years and they should be happy about it. Women's T20 leagues, such as the WBBL of Australia have propped up, employing a large number of female players.
But the basic question remains. Is it possible for a national level female player to compete against a club level male player (without any added advantage)? I have tried to watch a few of the WBBL matches, but I found them too boring. And in one instance, I stopped watching it, and switched to the Bradford Premier League match between New Farnley CC Vs Methley CC (in Youtube). And know what? I found the latter more exciting.