Contact was sporadic. He was there a lot when I was younger, but by age 9 he began taking jobs out of state or country. He'd either be gone weeks or months at a time. This also caused us to move a lot, which had a fairly negative impact on my development, IMO. I later learned the moves were unnecessary, he just wanted to. We had to follow. By age 12 he was unfaithful to my mother, and that set off a lot of crap that caused me to distance myself from both of them. My relationship with him is almost non-existent, but he's slowly been gaining my trust and getting to know me. Lately, I've been feeling better about letting him get to know me. I'm not sure what will happen when I tell him about transitioning, so I keep putting it off. I don't know his opinion, but he is generally fairly conservative. Still, I consider him to be the more reasonable one when it comes to my parents.
My relationship with my mother, who suffered quite a bit because of his decisions in life, is much worse. She took to alcohol to deal with the stress him being away all the time caused. Once he cheated on her, she decided to stay with him. Still, she couldn't let it go. Her life is now in shambles, and I have a hard time talking to her because she's taken to lies and manipulation to disguise her problems. I never know if she's sober or telling the truth, and she is constantly getting angry. I know she's had a rough time of it, but if she doesn't change I don't see how she is going to survive much longer.
In general, I just have a very distant relationship with most of my immediate family members. I'm much closer to my SO and one of my friends than I've ever been with family. If I lost my family, I think it wouldn't be much different at this point. Less obligatory phone calls.