I wrote
this a while ago because mixing is super important. But it also depends on what you're trying to do. If you just want to post your beats here or even if you just want to make a beat for only you to hear then mixing is not a big deal. If you're looking to have your beats heard by others or especially if you're trying to sell beats, then yes, mixing is a must.
What I usually do is just make beats, then every so often when I feel like doing something with those beats (like I just mentioned) then I'll just spend time mixing.
For
my last project, I spent a few days just working on my mixes because I was at that stage then, but it really pays off.