For my website[3] I'm really trying to keep weight on the wire down too so I am opting to skip the custom font and header image. It's quite nice to have 10-15kb pages in the age of the web obesity crises[4]. A header image and a custom font does have a big effect on how personal the content ends up though.
[1] - http://motherfuckingwebsite.com/
[2] - http://bettermotherfuckingwebsite.com/
[3] - https://hugotunius.se