Is Moon trine Venus a good aspect?

It is a comfortable one. Comfort is genuinely valuable and it is not the same as development: nothing in this contact applies pressure, so whatever grows in a chart carrying it usually grows somewhere else.

Why does it show up in how a home is kept?

Because both faculties are involved. The Moon is read for what feels safe and Venus for what is worth having, and a room is the first place those two get a vote on the same question.

Does it make someone easy to live with?

It makes their preferences legible and stable, which is most of what being easy to live with amounts to. It says nothing about the rest of the chart, and the rest of the chart is where the friction usually is.

Aspect

Moon trine Venus

Moon trine Venus is being soothed by the same things you find beautiful. The Moon is what feels like home; Venus is what registers as lovely. In easy contact the two agree, and agreement of that kind is quiet enough that the person who has it seldom notices.

It is the most companionable of the love trines and the least written about, because nothing in it hurts.

One taste, put to two uses

Venus holds two offices in the tradition: eros, magnetism and value in matters of love, and values in matters of money — what you find worth paying for. An easy contact from the Moon means the things that comfort and the things that get chosen are usually the same things, and that shows up in a room long before it shows up in a relationship.

The Moon is a light rather than a planet, and a light sets the level everything else is read against. When a light and a personal planet agree, the result is steadiness of preference: people carrying this contact are the ones who are described, accurately, as knowing what they like.

The cost is on the same ledger. A preference that was never uncomfortable is a preference that was never revisited, so this contact tends to produce taste formed early and held for a long time without much examination.

How it tends to show up

A home other people keep finding reasons to stay in.

Generosity offered before it is asked for, and without a ledger behind it.

A clear and unargued sense of what is enough.

Comfort and beauty rarely pulling in different directions, so neither gets much thought.

What changes the reading

A trine is allowed a modest margin, and a near-exact one reads as settled rather than as loud.

Venus is at home in Taurus and Libra and exalted in Pisces; where it stands decides whether the taste this contact produces runs to the sensory, the social or the tender.

A trine is an availability rather than an action. In a chart with harder contacts elsewhere, this is the one the person falls back on, and it is usually the part of them other people describe first.

Questions

Is Moon trine Venus a good aspect?: It is a comfortable one. Comfort is genuinely valuable and it is not the same as development: nothing in this contact applies pressure, so whatever grows in a chart carrying it usually grows somewhere else.
Why does it show up in how a home is kept?: Because both faculties are involved. The Moon is read for what feels safe and Venus for what is worth having, and a room is the first place those two get a vote on the same question.
Does it make someone easy to live with?: It makes their preferences legible and stable, which is most of what being easy to live with amounts to. It says nothing about the rest of the chart, and the rest of the chart is where the friction usually is.