If you want something thought provoking but a little less shonen then try out 5 Centimetres Per Second. It's a really thought provoking story of how people change as they grow up. It's also only 3 episodes long (mebbe 4, been a while since I've seen it)
Also, while I haven't yet seen the anime, I'd strongly recommend the manga of Bokurano, that is some good reading right thar.
Also, while I haven't yet seen the anime, I'd strongly recommend the manga of Bokurano, that is some good reading right thar.