My Morrissey solo listening vastly outnumbers my Smiths listening, probably something like 90% to 10%. This isn't really a reflection of quality however. I can explain it by the following:
On a 'song by song' basis, The Smiths are clearly superior to Morrissey solo with less filler - however, those songs are all embedded in my consciousness to such an extent that I don't feel the need to listen to them every day. Morrissey's solo catalogue is also HUGE, so there's much more material to choose from. Some random incredibly average solo Jesse Tobias B-side just feels fresher to me than listening to something like 'Bigmouth Strikes Again' - even if it's objectively a worse song.