Unfortunately, First Past the Post doesn't give me any choice where I live, and I suspect a lot of other voters are in the same boat. We're forced to be tribal, so I'll be voting Labour as usual, even though I'm not particularly enthusiastic about them (either under Corbyn or Starmer, who are broadly left and right of where I sit politically).
I guess I'm Lib Dem or Green by instinct, but more importantly I'm ABT (Anyone But Tory) - for the good of the country we simply have to get rid of the Conservatives. In my consituency (a Lab/Con marginal), a vote for Green or Lib Dem is worse than pointless - it's effectively donating my vote to the one I like less of the two that have a chance of being elected. I'd LOVE to vote for the candidate whose views best match mine, and change my vote now and again depending on the strengths of the candidates and the manifestos, but given the system and the circumstance in my constituency, that is not a rational act. Perversely, it's probably in my interest to encourage my habitual Tory-voting friends to vote Reform (who are even worse).
I'm certainly not Old Labour - I don't really care who owns the means of production, so long as they don't take the P**s. But even if I was sympathetic to Thatcherite policies (which were at least intellectually coherent, even though I don't think they work in practice) the current Conservatives are beyond the pale, and I hope a lot of moderate Tories come to the same conclusion. They're not a serious party any more. They've trashed British politics. They've been hijacked by an unholy mixture of the Hyacinth Buckets and golf-club bigots who run their local associations, and the Atlanticist thinktanks, shadowy non-doms and tax-exile newspaper proprietors that fund them and propagandise for them. They've now appointed (at least) three leaders in a row who has each been terrible in their own different ways. Their policies are little more than populist nonsense and infantile culture-war slogans, and they're showing worrying signs of wanting to weaken the constitutional safeguards that are supposed to keep everybody (not just them) honest. Even some of the more reflective Tory MPs seem to acknowledge that they've run out of steam and need a spell in opposition.
When I told my smear-campaigning rabble-rousing Tory candidate in 2019 that no, he couldn't rely on my vote, his very words were "I hope you vote Green then". Of course he did, because he wants to split the vote of the only candidate likely to beat him. So, on the grounds that they've still got a few broadly sensible (if feeble) policies on climate change, inequality and social welfare, some of their senior MPs aren't obvious idiots, and our local Lab candidate seems at least to be a human being, I'll be voting Labour, the clearly lesser of two evils, as I have for the last two decades, even though I wouldn't choose them as my favourite.
FPTP is like being forced to cheer for whichever of Liverpool or Manchester City you dislike least, even though both represent the interests that have shafted the team you actually support. It's depressing, but at least I can take pleasure when my Tory MP loses his job (which, given his majority is less than a thousand, is almost inevitable).