I've been playing with MySQL for a project of a friend of mine (http://www.yawn.be).
I honestly love SQL Server even more now :-) I don't want to talk bad about MySQL itself because I don't know enough about the product to do so. But the tools provided are really sad as opposed to the tools that are included with SQL Server. I just wanted to know the queries that were run and their io, cpu, duration etc (<3 Profiler<3) but apparently there is no way with the standard tools to determine this. Graphical Query plans or even plans like the Text Query Plans in SQL Server... couldn't find it :-(