I would have to agree that tubes typically sounds smooth, and sounds more musical or natural to my ears. I keep hearing the SS amps specs a better, low distortion, and therefore it should sound better.
It just confuses me. I probably prefer tube sound as long as the all the details are there, which I don't doubt as long as I have the right headphones.
It's always distortion, coloring, tube warmth, and etc.. People pick up tube amps because they like the sound, and lots of people do hear a difference in tube and SS.
The best way to find out if its for you is to use your ears. The shop that I work for pretty much only sells tube equipment. I chose this store due to how I responded to the sound. Every time I make it to audio shows I find myself always eager to see the next great whatever... but tubes just keep chugging along providing the listener with a much more enjoyable listening experience. Do not mistake detail for over accented higher frequencies, that only fatigues the ear over time. Most solid state has that effect.