I have long preferred fountain pens, ever since I started using one in school (no, we didn't have inkwells in our school desks in Birdsnest, Virginia).  That one belonged to my father's mother and I used it until the barrel broke in two in the vicinity of the lever used to fill the ink bladder.

I have six fountain pens in this here desk, plus the Waterman which I normally use.

There is an element of conceit herein, as, after you've used a fountain pen for a while, the nibs wear to fit your hand and the pen will then write properly for no one else.  

I fear that I don't use fountain pens very often any more, as they have been made obsolete by duplex checks; unless you use a ballpoint, the duplex doesn't.