I know IABU to talk about politics when there's a bajillion other threads on it already. I await your
throwing 
I've never even contemplated doing this before, in my head I've equated it to being the same as not voting at all. I want to vote, I want to take part in this democracy, but I'm so frustrated and disenfranchised. I don't want any of them to win. I don't want party politics and adults acting like kids slagging off other parties and other people in the newspapers and on TV because they have opposing politics. I want a group of people who have been elected for their own personal politics and views to sit down together and figure something out, rather than three or four groups of people waving their willies about and refusing to budge on issues because "that's what the party does" and just coming out with random slogans that mean nothing instead of actually answering questions.
I can't vote Conservatives. Hell would freeze over before I did.
I won't vote for Labour because while I think Corbyn is neither the demon nor the saint he's been made out to be, regardless of him the party is in a complete state and until one side or the other decides fuck it, this isn't working and does something to lead to a more united party, I can't vote for them.
My political views align with the Lib Dems, I think, and I like that Farron seems able to separate his religious views and his politics (unlike May who got all pissy about "Easter" but sees nothing wrong with food banks and disabled people dying), but I went to uni in 2012 so voting Lib Dem feels like heresy as one of the first years to be hit with £9k a year tuition fees (that said, I'm in Wales so the government fee grant took care of the extra, which may be why I'm not so militant about it).
Plaid, Greens etc feel like a wasted vote.
UKIP is a joke really.
What I'm getting at is, is spoiling your ballot the same as not voting at all? I don't want to write an essay on there because I know it won't get read, just to scribble all over it or draw in my own "none of the above" box or something. Last GE I saw people really criticising those who spoiled their ballots and I agreed, but now I feel so disenfranchised by it all. Do you vote for the lesser of all evils, just so that at least you've voted?