Positives: no mobile roaming charges
Negatives:
- less efficient home appliances (dishwasher, washing machine, drier)
- cookie law
- car annoyances (e.g. "beep if over the speed limit")
- paper straws
- attached bottle caps
- LED lights
- expensive electricity (a lot of this is caused by individual countries, but probably also the EU plays a role, e.g. by not classifying nuclear as "green" / "renewable" and banning Russian gas)