I'm not an expert but we saw giraffes all the time from the villas we've had on the Sunset savanna. The lower the room the better the view.
Another vote for 2nd or 3rd floor. Giraffes came to sleep under our 2nd floor balcony every night just after sunset. Email or chat with MS to find out how best to word your request. As another previous poster mentioned, you want Sunset savanna if you want to see giraffes.
Can a specific floor be a request? If so, how often is it granted?
LAX
The only time I went to Kidani, I requested lobby floor near bus stop. I got neither, and was as far away as possible. I'm terrified about our next visit. We're only returning because the grandchildren really wanted to stay there.