How many bits to have a secure psw to recall?

my personal belief is to have a psw with at least 130-140 bits (according to Keepass) which has to be remembered for accessing other stuff like your password manager.
In my case it's a 29 digits mixed case/number/characters.

It is enough?

 

Plenty enough

 

I would stick with randomly generated characters from a very a good pseudo random number generator. It's no fun memorizing random characters, but human generated passwords can be attacked in more ways. If you do choose random characters, please refer to the chart on Wikipedia's password strength page. 20 characters from the All ASCII Printable Characters space will provide over 128 bits of entropy.