By definition:

VARCHAR: The range of Length is 1 to 255 characters. VARCHAR values are sorted and compared in case-insensitive fashion unless the BINARY keyword is given. x+1 bytes
TINYBLOB, TINYTEXT: A BLOB or TEXT column with a maximum length of 255 (2^8 - 1) characters x+1 bytes

So based on this, I creaate the following table:

CREATE TABLE `user` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(255),
  `lastname` tinytext,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1

Or is it better to create a varchar or tinytext and why?

Is it the same for:

VARCHAR: The range of Length is > 255 characters. VARCHAR values are sorted and compared in case-insensitive fashion unless the BINARY keyword is given. x+2 bytes
BLOB, TEXT A BLOB or TEXT column with a maximum length of 65535 (2^16 - 1) characters x+2 bytes

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