Summoner's camera has another very subtle and terrific feature, the camera is normally at a fixed height from the character, but when going up or down hills, the camera very gently and subtlety changes its angle, so that you look 'up' the hill when going up and look 'down' the hill when going down. It's a tiny little feature that most people probably don't even notice, but it makes an enormous difference to the gameplay.
There was one MMORPG (Asherons Call 2? Can't quite remember...) that did it similar. Then when I played another MMORPG that did not have this nice feature (or was it AC2 that did not do well on this aspect?) only then I noticed how nice this feature was. Really nice! How I missed it after experiencing that. <img src="/ubbthreads/images/graemlins/cry.gif" alt="" />
It has to be implemented in the right way... it could be annoying if the camera always shows things you don't want to see... and you have to adjust it to see the things interesting you.
Oh, if you implement this nice feature... please also give us the option to turn it off.