Here are some messages about the morning, in Arabic, catering to different tones :

General/Sweet:

* صباح الخير! (Sabah al-khair! - Good morning!)
* صباحك عسل! (Sabahuk `asal! - Your morning is honey/sweet!)
* صباح الورد! (Sabah al-ward! - Morning of roses!)
* صباح مشرق! (Sabah mushriq! - Bright morning!)
* صباحك فل! (Sabahuk ful! - Your morning is a jasmine flower!)
* صباح الخير، يا أجمل قلب! (Sabah al-khair, ya ajmal qalb! - Good morning, O most beautiful heart!)

Motivational:

* صباح جديد، فرص جديدة! (Sabah jadid, furs jadida! - New morning, new opportunities!)
* صباح مليء بالطاقة الإيجابية! (Sabah malī’ bil-ṭāqa al-[SQ]ijābiyya! - Morning filled with positive energy!)
* صباح النجاح! (Sabah al-najāḥ! - Morning of success!)
* صباح التفاؤل! (Sabah al-tafa[SQ]ul! - Morning of optimism!)
* استمتع بيومك الجديد! (Is-tamti` bi-yawmik al-jadīd! - Enjoy your new day!)

Funny/Playful:

* صباح الخير، يلا قوم! (Sabah al-khair, yalla qoom! - Good morning, let[SQ]s get up!) (Slightly bossy, but playfully so)
* صباح النعاس! (Sabah al-na`ās! - Morning of sleepiness!) (Humorous, self-deprecating)
* صباح الخير، متأكد إنك صحيت؟ (Sabah al-khair, muta[SQ]akkid innaka saḥit? - Good morning, are you sure you woke up?) (Teasing)


Remember to choose the message that best suits your relationship with the recipient and the context of your communication.