I've listened to Nos. 1, 2, 4, 5 & 7 and the one I like best is No. 4. It was written at a time when he was struggling with depression and alcoholism, and the music reflects that. I like the way in which the finale begins to build up to a conventional climactic ending, but then in the last few minutes the music concludes in a slow and moody way. This perhaps expresses the mood swings he was suffering from. I think he really found his voice in this symphony.