I think a lot depends on the day nap.
Logan generally naps in the middle of the day, from around 11:30, sometimes 12, and usually only 1.5 hours, although I suspect he sleeps a bit less than that at creche.
On days he is with me (Wednesdays and weekends) he usually has that one nap and then will often go to sleep between 7 and 7:30. Very occasionally he will have 2 naps but that is the exception, and when that happens he only falls asleep between 8-8:30.
On days he's at creche a lot depends on whether or not he falls asleep in the car on the way home. If he does, then he usually lands up falling asleep around 8-ish which personally I feel is a bit too late.
On days that he doesn't fall asleep in the car he generally falls asleep around 7-7:30.
A friend of mine's son (about 20 months old now) naps in the morning, I think around 9 or 10 and then won't sleep again for the rest of the day. He's asleep for the night by 5:45 or 6 most nights.
Logan and I normally get home from work and creche at about 5:30, and dh at 6. We then bath him at about 6:30 (I give him supper as soon as we get home), and then he lies on his change mat stroking his fluffy bunny and drinking his bottle while i dress him. Very occasionally I then put him straight into his cot and he goes to sleep. But usually once i've finished dressing him he passes me his bottle and we then go through to the lounge again where we have calming music playing (Lize Beekman Lullabies) and most of the lights are off and he plays quietly and often brings me books to read to him. When I feel he is getting tired then I take him to his cot and give him the rest of his milk. Sometimes we have to walk up and down with him a few times before he'll go to sleep, other times it's just into his cot, milk, asleep.
He usually wakes up around 7-7:15 in the mornings.