Except, as evidenced by your mentioned friends, some of whom are now feeling regret for having felt obliged to vote "their party affiliation"?
That can be OK... because sometimes those 'admitted regrets' can turn out to be real turning points. My 2000 'W' vote turned out that way for me. Not initially (i.e. directly following 9/11) but over time and in the end result... absolutely. Even in hindsight I would not have voted for Gore, but it is when I actively started seeking viable alternatives to the D-n-R.
I won't say I have NEVER voted straight party in my life... but not in 'memorable' history. 2010 was the first year that there was one particular race where I couldn't find a single candidate I could feel comfortable voting for, regardless of party or NPA. And yes, in that race, I did a
ridiculous write-in on personal principle alone... so there would be no mistaking that I didn't just "miss" filling in a dot.
(as if anybody looks at or gives a $heeit about ballot write-ins anyway:roll

.