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I don't really use default Photoshop brushes because they don't behave like how I expect them to, so I have to fine tune them to my preference.

Thanks Theresa.

Same, I used to modify the brushes but my friend had all of the Kyle T Webster brushes that she let me download. I pretty much use those exclusively. He has a ton that mimic different tips of inking tools, pencils, art markers, etc.

Custom brushes are awesome, though the problem with them is that I have to relearn each brush all over again and memorise them, or they just clutter up the space and eat memory. Hehe, first world problem? XD