Can't say as it's been a problem for me, no...
But, you can change it to anything installed on your system -- go to
and you'll get the list of available fonts and a display window of sample text from the Font-selection dialog. If you open a file in the Editor in a window you also can see, the APPLY button will show you the results in that edit session.
There are a number of other monospaced and sans serif fonts you can try -- proportional fonts may look pretty but are generally hard to code with since indenting doesn't stay uniform.
I've typically not been bothered enough to ever change it, one of the Lucida fonts is one I have used in the past.