I am not a lefty but still hold pens in a strange way so fountain pens have never worked for me which is why I like rollerballs (and sometimes ballpoints). I blame my father for starting me down this rabbit hole and my younger brother for enabling me all these years (he collects vintage fountain pens). Many from "my collection" have sentimental value even if they are not worth that much:

Montblanc Meisterstück pencil - bordeaux (HS graduation gift from my father - no longer made)
Montblanc Meisterstück ballpoint - bordeaux (HS graduation gift from my father - no longer made)
Montblanc Meisterstück rollerball - bordeaux (purchased on my honeymoon - no longer made)


Parker Sonnet rollerball - sterling silver


Fisher bullet - chrome (was EDC but kept loosing it - eventually it shows up)


Fisher X750 - chrome (was EDC but kept loosing it - eventually it shows up)


Tombow Zoom 505 rollerball - grey (EDC for now)


Sherpa pen cover - Mr. Pinstripe Black (EDC for sharpie marker - can also be used with uniball vision)


Cross ATX rollerball - celeste blue (from wedding - used to sign marriage license)


Acme blueprint roller (from mortgage signing on our first house)