I used to play Nami a lot. Like as my main support and loved her and her massive utilities she gives.
The one pet peeve of mine with Nami is the cast time on her ult (swinging her staff around) because put her ult on cooldown as soon as you use it but if you die or get cc'ed the ult will never go off....just irks me. So I went back to Sona for her insta ult lol