In no particular order.

• Oxfor Optik Paper 90gsm - it does wonders for me because here it is cheap, widely available at any stationery-related shop and comes in a variety of formats (spiral, bound, loose-leaf, planners, etc). The value/price in the Euro zone is unmatched IMHO.

• Clairefontaine bound notebooks, specifically the My Essential line — designed to answer Leuchtturm bullet journal offers. While a little bit more pricey, it is also a really solid option if Leuchtturm1917 seems way too expensive.

• I specifically try to use Navigator 80gsm when I print something and then intend on taking notes with my FPs. Cheap, widely available and a really good value/price ratio.