I have a sliding patio door on mine, its nice. Having the sliding door allows a lot of light to come in and also makes the interior feel more open. The only issue I have found is the dirt gets in the track.
1st was 2009 Laurentian Ranger 190xp (written off in 2011, water damage)
2nd was a 2000 Keystone Sprinter 315BH
3rd was a 2006 Pilgrim 312BHSS
Now 2012 Forest River Salem 36BHBS