Well, I personally choose PostgreSQL for my personal stuff, but your logic doesn't hold. PostgreSQL was slow, but correct. Now it is fast and correct. MySQL was fast, but wrong. Now it is fast and correct. Most of the reasoning behind picking one or the other has disappeared and we're left scraping the bottom of the nitpick barrel trying to convince people to use one over the other.
As for why someone would choose MySQL, there are a bunch of reasons. There are a lot more people with MySQL experience out there. MySQL has better replication facilities (and I've set up replication with MySQL, Slony-I and PgPool-II). I'd really like to see Mammoth Replicator become the standard in the PostgreSQL community (as well as for 1.8 to be out of beta) as I think it's a considerably better replication design than the other options in PostgreSQL, but right now MySQL replication looks a lot better. Maybe you have a good use for one of MySQL's less used storage engines. MySQL Cluster looks interesting, but I wouldn't trust my data to it today (even if Zillow seems to think it's the best thing since sliced bread).
The differences between the two are really minor today. Choose whichever one you like, but there are definite reasons to choose either one.
As for why someone would choose MySQL, there are a bunch of reasons. There are a lot more people with MySQL experience out there. MySQL has better replication facilities (and I've set up replication with MySQL, Slony-I and PgPool-II). I'd really like to see Mammoth Replicator become the standard in the PostgreSQL community (as well as for 1.8 to be out of beta) as I think it's a considerably better replication design than the other options in PostgreSQL, but right now MySQL replication looks a lot better. Maybe you have a good use for one of MySQL's less used storage engines. MySQL Cluster looks interesting, but I wouldn't trust my data to it today (even if Zillow seems to think it's the best thing since sliced bread).
The differences between the two are really minor today. Choose whichever one you like, but there are definite reasons to choose either one.