Listen to
Abigail-II
Don't think of it a what is right for Perl but what is right for you. Perl can be used to touch practically any database, the list of compatible DBI modules keeps growing. We seem to adopt that which we first come in contact with. Which you seem to have done, but it doesn't hurt to look around. Here is a link to MySQL's db comparison page.
Some other things to consider:
How stable is it?
How portable is it?
How secure it is?
How easy is it to administer?
What kind of support is available and does it have a cost?
How much does the db cost?(for the budget minded)
How mature is the DBD module for the db you want? If you are using DBI.
What third party apps are available for it?
Cheers
Gyro