My DH and I are 19 years apart. We've been together over 4 years an married for 3. We enjoy doing the same things and to me the age gap is great bc he is mature and settled and I don't have to worry about him wanting to go out and party every weekend.
My SO is 55 and I am 29. I am at a point in my life where I just want to raise my kids and be emotionally supported. He provides that for me. I have always been mature for my age. I don't drink or party and neither does he. I don't think age matters at all.