When I look at SQL query, I understand it. This syntax even cry: SELECT, FROM, WHERE, AND, INNER, LEFT JOIN — use this words and get success. Nothing else. But typical ORM provides you a lot of 'underground process' — they're trying to simplify process, but as result — as developer I need to spend time on understanding 'What does that guys mean when then hide simple query from my eyes'.

Headfull ORM in my mind — it's ORM with clear syntax, typing and minimal possibility simply DESCRIBE your table and CRUD with any entities in that table with well-known SQL-syntax.