G'day, Nicola! From one new forum member to another, welcome!
I too am firstly interested in using fountain pens with some flair in my handwriting (once I've tidied up my typical chicken scratch), especially using my personal preference of F and EF nibs with which the production of line variation relies more on the user's hand than the nibs' flexibility. Maybe I'll need to venture out to broad nibs, stub nibs, music nibs, et cetera some day, but for now all ‘my’ fountain pens that write broader than a typical Japanese medium (with the exception of my two Sailor pens with Naginata Concord nibs) have made their way into my fiancée's pen collection.
OK, that's not strictly true; I'm still struggling as to whether to pass my Pilot Custom Heritage pens with SFM (soft fine medium) and FA (Falcon) nibs to her. Those pens sorta irk me with how they write normally, even though both are capable of producing far finer lines than, say, my Pilot Custom 74 with a #5 SF nib.
What do you prefer to use?