Mi piace questo stile.

Because piacere works differently from to like in English.

In Italian, piacere literally works more like to be pleasing to.

So:

• Mi piace questo stile = This style is pleasing to me
• word-for-word: to me pleases this style

That is why mi means to me, and piace agrees with the thing being liked, not with the person who likes it.

Mi here means to me.

It is an indirect object pronoun. With piacere, the person who experiences the liking is usually expressed this way:

• mi = to me
• ti = to you
• gli / le = to him / to her
• ci = to us
• vi = to you all
• gli = to them

Examples:

• Mi piace = I like it / It pleases me
• Ti piace? = Do you like it?
• Ci piace = We like it

Because questo stile is singular.

With piacere, the verb agrees with the thing that is liked:

• piace for singular things
• piacciono for plural things

So:

• Mi piace questo stile = I like this style
• Mi piacciono questi stili = I like these styles

A very common learner mistake is to choose the verb based on mi or on I, but the verb actually matches stile.

Because stile is a masculine singular noun.

The demonstrative questo must agree with the noun:

• questo = masculine singular
• questa = feminine singular
• questi = masculine plural
• queste = feminine plural

So:

• questo stile = this style
• questa casa = this house
• questi libri = these books
• queste scarpe = these shoes

Even though stile ends in -e, it is masculine.

Stile is masculine: lo stile, questo stile.

Nouns ending in -e can be either masculine or feminine, so you often have to learn the gender along with the word.

For example:

• lo stile = style, masculine
• la notte = night, feminine

That is why it is useful to memorize nouns together with their article:

• lo stile
• not just stile

Yes. A me piace questo stile is correct.

The difference is emphasis:

• Mi piace questo stile = neutral, normal
• A me piace questo stile = I like this style / As for me, I like this style

Often a me is used for contrast:

• A me piace questo stile, ma a lui no.
  • I like this style, but he doesn’t.

You may also hear both together:

• A me mi piace questo stile

This exists in spoken Italian, but many teachers and grammar books prefer A me piace or simply Mi piace in standard usage.

Yes, although Mi piace questo stile is the most neutral order.

Possible variations include:

• Questo stile mi piace.
• Mi piace, questo stile. (more marked, context-dependent)

Putting questo stile first can emphasize it:

• Questo stile mi piace, quello no.
  • I like this style, not that one.

Italian word order is more flexible than English, but the standard sentence is still the safest choice for learners.

Put non before the verb:

• Non mi piace questo stile.
  • I don’t like this style.

This is the normal way to negate sentences in Italian.

Usually just use intonation in speech, or a question mark in writing:

• Ti piace questo stile?
  • Do you like this style?

If you want to keep I as the subject meaning, you would ask:

• Mi piace questo stile?
  • Do I like this style? (less common unless reflecting or checking)

More naturally, to ask someone else:

• Ti piace questo stile?

Italian does not usually need an auxiliary like do.

A natural way is:

• Mi piace molto questo stile.

You can also say:

• Questo stile mi piace molto.

Both are correct. Molto usually comes near the verb phrase.

Then the verb changes depending on whether the thing liked is singular or plural.

Compare:

• Mi piace questo stile. = I like this style.
• Mi piacciono questi stili. = I like these styles.

More examples:

• Mi piace la musica italiana. = I like Italian music.
• Mi piacciono le canzoni italiane. = I like Italian songs.

So remember:

• singular thing liked → piace
• plural thing liked → piacciono

A simple approximate pronunciation is:

mee PYAH-cheh KWEH-stoh STEE-leh

A few helpful notes:

• mi sounds like mee
• piace has two syllables after the pi- sound: pia-ce
• pia is like pya
• questo sounds roughly like KWEH-sto
• stile sounds like STEE-le

The stress is:

• piàce
• quèsto
• stìle

Yes, depending on the nuance.

For example:

• Amo questo stile = I love this style
• Adoro questo stile = I adore this style
• Questo stile mi piace molto = I really like this style

But for the basic idea of to like, piacere is the standard verb.

It is neutral and works in both formal and informal situations.

There is nothing especially casual or especially formal about:

• Mi piace questo stile.

It is a normal, everyday sentence you could use in conversation, writing, shopping, fashion discussion, art discussion, and so on.