Bane's intelligence remains untouched (with his calculations involving the fusion reactor and his precision to hinder the GCPD and isolate Gotham from the outside world), he was never a freedom fighter (that was cleared up instantly early in the movie -- excommunicated from the LoS for his extreme radical nature) and he wasn't a servant to Talia.
Perhaps the biggest misconception about Bane's and Talia's relationship is that Bane was an employee or henchman, and he was in love with her, but I don't see how either one of those theories fit into what we saw. The belief that Bane loved Talia more than a little sister and/or daughter, could never really be confirmed. Bane didn't display any intimacy towards Talia hinting at anything more. In regards to Bane taking orders, Talia's plead to keep Bruce alive just long enough to feel 'the fire' was not an order. And even if it was an order, Bane disobeyed without hesitation.
Bane and Talia were partners. Both were immensely loyal to one another. If Bane were anything less, I doubt Talia would have taken the time to fix Bane's mask within minutes of their demise.