Is it normal to still feel tired even after sleeping 7–8 hours?

It's better than when I sleep less than 6 hours, but it's hard to wake up and I still want to sleep more.
Even after waking up, I feel drowsy and exhausted for a while.
How about you all? Do you feel completely refreshed after 7–8 hours of sleep, or do you also feel like you want more sleep and still feel tired like me?