This is SO hard.
Barney and Lily are kinda tied for place #1 (I rank Barney as #1 and Lily as #2 but I adore them equally!)
Robin is surely my #3 (ADORE HER from S2 and on!<333)
Marshall & Ted are tied for #4. I used to adore Marshall in seasons 1 and 2 but from S3 he's officially BORING. Ted wasn't my cup of tea at the beginning but he's grown on me, I surely identify with him<3

I never understood why people must hat on Ted, he is my favorite character. This was difficult as I do not dislike any of them but I have found Lily annoying at times.

This is hard because I love them all it was either ted or marshall

I like them all, though Marshall can be very irritating and Barney started dating and marrying the girl his best friend was in love with and knew this, I'd just had to choose Robin and I have thought a lot about it, she's a hypocrite, she claimed she never wanted to get married, have kids and wouldn't be with Ted because he wanted those things however while she and Barney never had children together, they got married and it may not have been a happy marriage since they divorced in the finale, they were still married for a long while and she was usually always jealous of Ted's relationships, like with Victoria, Stella, Tracy. She had no right cause she chose not to be with him. Then Barney and Ted's friendship nearly fell down the tube as Ted nearly left for Chicago because of the marriage with the woman he was so in love with until he met Tracy, it really ticked me off when they killed her off. Anyways, so, yeah, I chose Robin.

My faves are
1. Barney
2. Marshall
3. Tracy
4. Robin
5. Lily
6. Ted