I carry a nice Parker ballpoint pen or an ex Company presentation Roller Ball, both are very nice.
In my desk drawer I have Parker Quink and two nice fountain pens, a Parker which has a good antique value and with a two sided nib, fine and normal plus a Sheaffer, again both are very nice.
In addition I have copy sets of Mont Blanc and Jaguar pens bought in Jakarta. I took the Mont Blanc ballpoint to a Mont Blanc shop in Bangkok for a refill. The lady politely informed me it was a copy, "My goodness, said I"
I write neater with a ballpoint but writing with a fountain pen, neatly, has been a lifelong failed ambition