Two test series

South Africa and Pakistan have just commenced a two test series in Pakistan. I don't know about anyone else but I just find two test series so unfulfilling. I understand the difficulty in fitting in longer tours into the packed schedule, and to be honest, three test series involving Bangladesh can be too one-sided. When two evenly matched teams are involved two test just aren't enough. This current series has the potential to be a cracking contest, it would be a shame to leave it one all. I would much rather fewer series if they were longer, even four tests.