I too have gone with fountain pens as my every day pen. There's zero waste with a bottle of ink and a cartridge. I find that the variety of inks to be superior too.

True! I specifically use Noodler's Bernanke Black ink because it's fast-drying. I'm left-handed, and I can easily smear ink as I write if it doesn't dry quickly. Left-to-right writing definitely favors right-handed people.

Oh, good grief, in that case you might want to start with a Pilot medium (roughly equivalent to a German no. 5 'fine') and work down from there. Without wishing to invite contumely on the sometimes extremely fractious topic that can be Noodler's inks, I will say my experience is that all the feed and nib throughput you can possibly give them will never really be too much, especially in Japanese pens.