I've been exactly where you are OP, I even started a thread on here when I was expecting DS2.
I felt everything you are feeling right now. Mine are 3 and 1 now and I LOVE having two boys. I am ashamed to say that it has taken me some time to get here - I hate admitting that because both boys are fabulous, but it's true I'm afraid. I have always loved them immeasurably, but I think it has taken this time to allow my confidence in what I have to grow, and to then overshadow any negativity I receive from other people. I know I shouldn't take any notice of what others say, but it's easier said than done and I think it's good to be honest when others are asking for advice.
Boys are wonderful. My eldest is a little explorer and this morning we had a great walk in the woods where we discovered a cave, sat in a tree shelter someone had made out of branches and splashed in all of the puddles. He is so affectionate and loves his mummy, much more so than any of my friends similar aged girls. He is easy going, doesn't tantrum much and is so friendly to others. He loves dinosaurs, getting dirty and running about - he's a stereotypical boy and I love it. I was always worried that I wouldn't have much in common with my sons, but guess what, because he loves dinosaurs, I love dinosaurs too now. I think you find an interest in whatever your children are passionate about, even if you thought you'd never be interested in anything like that before.
The youngest is really finding his feet now and has so much personality. I definitely felt less of a bond with him to start with - maybe it was just having two so close together and not having the same amount of time to spend with him, plus he was a much more difficult baby - however I don't feel like that anymore. He is really into his food and as the eldest has always been super fussy, that's sort of become his 'thing'. I love just sitting with him at the table and exploring lots of new foods. I'm so excited to find out what his passion turns out to be, maybe it will be dinosaurs like his brother, maybe trains, dolls, drawing, tractors - who knows!
Honestly, don't feel bad. The amount of crap I got from other women about having two boys was unbelievable. I wonder if men are the same when their male friends have only girls. It's less as they've got older. We're not sure whether we'll have any more children, but we won't be 'trying for a girl'. That said, of course girls are lovely too and there is no reason to think that girls can't get muddy and love dinosaurs either, or that it's not nice to like ballet and pink.
You will be fine OP. I'm also thinking the teenage years might be kinder - probably smellier, but less hormonal stuff!