You are who you are. Women aren't all 100% feminine and men aren't all 100% masculine. It's more that we're walking a path where we can dip in and out of both. The issue a lot of people have with being transgender is identifying what's acceptable and what's not but at the end of the day we are who we are and if we like something that's more feminine than masculine, that's okay, and vice versa.
Sometimes, like desperate believer points out, transgender individuals are held to a higher level of masculinity or femininity than their cis counterparts almost as a justification for others of how they have to behave to justify their transition. But we don't live in a time like that now.
Here's one to think about, Kiefer Sutherland is actually quite effeminate; just this often overly nice, sweet guy. But he plays Jack Bauer on 24; a guy that many masculine men look up to and want to be. But let's even have a wee look at Jack Bauer himself; he cries, A LOT! Jack Bauer will lay down his life for the love he has for his daughter. Jack Bauer has a sensitive side as well as his hard-ass persona and is played by a bordedline camp dude (watch a few interviews and you might see what I'm getting at here). I've actually had the insane pleasure of working with Kiefer before, it's just an observation he doesn't deny himself.
When you look at Jack Bauer and Kiefer Sutherland, neither are "100% masculine", Bauer has more masculine traits, sure, but look how he is about his daughter and how many times she's brought him to tears. And Kiefer is way less masculine in real life.
There are many effeminate men who are happy as men. There are many butch females who are happy being female. And neither traits even determine sexual orientation, I know an effeminate guy and a butch female who are both straight and married! That's just the kind of world we live in these days, some girls like sensitive guys, and some guys like more masculine. Perhaps as a way to share more in common.
So when it comes to wondering if you're masculine enough or if the feminine traits stop you from being FTM transgender, it shouldn't. However, YOU are who YOU are and the only question really is whether you want to actually go so far as HRT or surgery. And this means you have to actually look inside yourself, and talk it out with a therapist if you can, to see if you actually have to go so far as to become a physical guy to be happy. Only YOU can answer this one. I also wouldn't even go so far as to say genderqueer = 50/50 mix. I know a couple personally and they definitely lean more one way than the other but not enough that way to consider changing gender. You can also be transgender and not go for HRT or surgery and just be happy and left able to essentially switch it on/off as you please. If that feminine side comes out and wants to appear feminine, you have that option.
Essentially at the end of the day what my opinion is is that you don't have to be 100% masculine to be transgender, however, beyond that if you're looking at HRT and surgery, that's permanent changes that you can't always go back on. So you don't have to be 100% masculine to go for these changes but you should be 100% sure you want the changes. That's on your plate now and we can't actually tell you if that's right for you or not. But rest assured if you think this is for you, you will go through many stages before HRT and surgery is even an option, so you will have the chance to discover if it's for you or not.
The best advice would be to actually talk to someone professionally about it. Don't be scared about being pushed into HRT or being considered less transgender because you're unsure of yourself. By talking it out you'll be better placed to discover what path you're on.