Golden retriever. A boy. If you want something sparky and fun, go working lines or show x working lines.
Do not be fooled into thinking goldens are daft as a brush and like Labradors. They can be arseholes if you get one with a bit of attitude. Show lines will be the most docile.
My first was working x show and he was an ask me don't tell me dog, but my god he was my best friend for nearly 14 years. I lived for that boy. He's been gone almost two years and I'm not over him.
My second is also show x working but more working. She's fast, over eager about everything, loves to run and very slim built. The girls are definitely 'easier' and more obedient I find. She is also a therapy dog and visits elderly people in their own homes who are socially isolated and or dog lovers who can't have their own anymore.
My third is heavily show lines and so chilled out he's practically horizontal. But I got him when I had an 18 month old, and he's just the ticket. He's a big cuddly bear, very smart, has done very well at gun dog training despite being mainly show lines. He is a bit of a worrier, he's quite literally a big baby and he is now 18 months. He will settle more as he matures.
Wonderful personalities, generally very reliable. You can make mistakes with their training and usually right them, as they are very forgiving. That's the main reason I wouldn't have GSD, too worried I'd inadvertently put a problem into one that I couldn't train back out. Give me a golden retriever any day of the week.