while there are a lot of different improvements, i'm really looking forward to the enhanced JSON functionalities (particularly the new operators [0]) and the LATERAL JOIN [1]<p>[0] <a href="http://michael.otacoo.com/postgresql-2/postgres-9-3-feature-highlight-json-operators/" rel="nofollow">http://michael.otacoo.com/postgresql-2/postgres-9-3-feature-...</a>
[1] <a href="http://www.postgresql.org/docs/9.3/static/queries-table-expressions.html#QUERIES-LATERAL" rel="nofollow">http://www.postgresql.org/docs/9.3/static/queries-table-expr...</a>