I've got really conflicting views on this, and I can never decide which side to come down on.
On one hand, I think she's a really good depiction of the trap of 'compulsory heterosexuality', which an awful lot of people fall into if they aren't at that extreme a position on the Kinsey scale. For most gay people, it's presumed that at a fairly young age they'll fancy someone of the same sex and then they'll notice it about themselves. Which isn't necessarily always how it works, because not everyone is all that attraction-driven, not everyone falls in love that strongly, and anyway none of us have ever been in someone else's brain besides our own so we can't directly compare the way that we feel attraction to how anyone else does. I feel this is shown quite strongly with Imogen - in the early series, what she finds appealing is the idea of having a boyfriend, far more than she finds any actual boy appealing. And because she can't directly compare like-for-like with someone else's experience, she understandably presumes that what she's experiencing in wanting a boyfriend is what every straight girl feels. And she may well have felt like that for the rest of her life without knowing any different. There are many people who settle into conventional heterosexual marriages and have children, and have a kind of superficial happiness with that life because they just don't realise there's another option that would make them happier. Imogen was just fortunate in that she happened to slip into a mostly LGBTQ+ friendship group, and as she spent more time with characters like Tara and Darcy she got to see that what they had was what she wanted. I think her journey there is depicted very beautifully.
But on the other hand, I'm thinking about Series 1, and what Imogen represented to me. She has a bit of a shit time of it in that series - first her dog dies, and then the boy she likes turns her down. And I just adore the scene with her and Nick in the park when he tells her he doesn't like her like that, largely because of Imogen's reaction to it. She goes there hoping he's going to be her boyfriend, and when she finds out he isn't she handles the disappointment so incredibly maturely and respectfully. I really liked that, because she subverted quite a sexist trope - before that point, Imogen mostly seemed like she was going to represent the clichéd 'other woman' in every romcom, and be clingy and whiny and obviously not someone the audience was meant to root for at all (and probably turn out to be homophobic as well). But in her dignified reaction, and her ability to continue to be friends with Nick afterwards, she threw the audience a curveball - she's actually a lovely girl who might have been good for Nick if he hadn't met Charlie. I thought this was an incredible breath of fresh air, and not something you see enough in this kind of programme. Revealing that she's a lesbian means the context to this is that she wasn't all that into Nick in the first place, which I think takes something away from the strength of this scene. I liked that she genuinely really wanted Nick, but her feelings for him were such that she wasn't selfish about it, she respected him as a person and was able to accept it when he told her he didn't reciprocate. It showed that when you've been rejected, it's possible to compartmentalise your romantic feelings for someone and decide to be platonic friends with them (it's too easy to just feel awkward afterwards and never talk to each other again, which doesn't really benefit anyone). Plus I just think the show needs more cishet allies - they're really important because otherwise it gives the impression that you can only respect and love LGBTQ+ people if you're LGBTQ+ yourself, and that's not how it is. Obviously there's Tao, but I don't like a single token straight any more than I like a single token gay!
Imogen's my favourite character, and I am completely torn between these two instincts. Can never decide which I like more. What does everyone else think?