Incidentally, gsm alone is not a good indicator of paper quality. That'd be like using megapixel count for cameras or frequency response for headphones. For example, one of my all-time favourite papers is Tomoe River, which is great for really wet nibs even at only 52-53 gsm; weight is a useful measure of quality, butsizing and finish matter too, so you really need to try before making any hard calls. And yeah, most people I see using Moleskine do seem to gravitate towards ballpens and pencils, more so the latter. Used to be a mech pencil guy myself, but inks are too much fun to play with.