So I'm preparing to make a character for the next campaign I'm joining and I wanted to play a claric that drinks, gambles, smokes and enjoys pleasures of the body. I already have an idea for the personality and backstory but I just don't have an idea of what Domain would fit this character. I'm up to suggestions.

I would suggest Trickery domain. The deities for that domain more-or-less fit the type of toon you're describing, even without being generous with the interpretations of their respective stations in the pantheon.

I should mention that this setting is a home brew setting where there is only one Goddess. The big religion in the campaign is "the everlasting light" and I thought playing a degenerate priest with terrible habits would be fun. I think I'll take a look at the trickery domain.

I was a little surprised Sharess (aka Bast) the God of Hedonism is classed as war domain.

Trickery would work, you could also go with a hippy vibe and go peace domain.

Trickery.

You could do tempest since the seafaring worshipers tend to be sailors (or even pirates)...who might have a rep for drinking, etc.

I don't see any reason not to use twilight as long as you fight the night terrors.

War is so broad you could make an appropriate background story/profile.

Life domain could work for someone attached to the pleasures of the flesh. 

Learned dy Cabon, from the Paladin of Souls (by Lois McMaster Bujold), is a nice example of a character who is both sincerely pursuing his divine calling but still very much attached to more earthly delights.