Its good to be negative . Keeps the over optimistics in check.
Recent buy back does not indicate the promoters are self centered in any way(I think u might be wondering abt why not pay the dividend- Taxes-Its a huge cash pile is my opinions). Promoters esp with such a significant stake are more aligned to company objectives than normal stakeholders. Intuitively i feel the management has waken up from a deep slumber and they see a huge turn around in place and they have adequately compensated with a reasonable price rather than cornering them(shares) at a cheap price buy pouring in negative views