Olet tarkka.

[kirkeby]

English Translation

You’re particular.

I am not sure what ‘particular’ is supposed to mean. In this case I would prefer ‘pedantic’.

https://en.wiktionary.org/wiki/tarkka

[morbrorper]

I would rather have somebody call me tarkka (accurate, precise) than epätarkka.

https://en.wiktionary.org/wiki/epätarkka

[kirkeby]

Ha, sounds like a good insult, ‘minusta, sinä olet epätarkka’