Dominaria, Urza, Phyrexians, Eldrazi were all cool. Alara was great. Lorwyn Shadowmoor was great. I don't know when MTG went to shit but I think Theros / Tarkir is around when it started. Innistrad was the last good block lorewise. Then they just started ripping off real-world cultures and increased the cycle speed of Standard so we jumped around worlds so fast it all felt generic and phoned-in. Magic's great but it moves way too fast unless you're a serious player. It should be one new set a year, maybe two tops. But then the game would die so that would be bad. Old MTG art was top-tier though, actually gave me dreams about another world, I loved to imagine old magic. That went away after Lorwyn and Alara.