I watch both of them and it seems at the moment that Naruto is certainly more 'fun' and mind you i have reached the Shippuuden area section (only in the middle of season 2 of naruto) but it seems that Bleach has a deeper story at the moment mind you I have another 100 or so episodes of that to catch up to the 'now'

so i'll say bleach is better storywise but naruto is better in the comedy area