I like 3 and 6 being the night levels. Alot of action in them.

all world 1

My favourite levels are:

1-1. There's something very intriguing about watching the demo at the title screen. Also, for me, it was the first part of any video game I laid eyes on. So yes, in a way, for me it's the most classic part of the whole game or any game for that matter.

1-3. The hilltop platforms were really cool. Again, a very classic level.

2-1. Just coming out of the castle and the next level was the water-world one. And it had the trampoline at the end of the level! I also loved the very beginning with the Koopa Troopas in that confined area. When I was a lot younger, I used to see how many times I could bounce the shell off the wall, stop it, and then kick it again.

I like the levels with the green tree looking things you have to jump across.

i liked the first one. pure, retro, classic. the best combination.

3-3

8 with that darn jump I replayed to that point about a hundred times before I learned to keep bouncing off the turtles.

Hmmm I think my favorite is 8-1. I think it's the longest level in the game, and it's also fun.

yes, the first one is very retro indeed. it would be my favorite as well, without a doubt. (1 - 2 is cool too, since you can jump straight to level 5 there)

My favorite level is 4-4, the final castle in World 4. Because I refuse help from anyone else, it took me forever to figure out the pattern through the maze. Also, I love the under-water levels.

The very last level, 8-4. I remember it took me a while to figure out which pipes to enter, heh. It was definitely the most challenging level.

quote Dark Bowser

yes, the first one is very retro indeed. it would be my favorite as well, without a doubt. (1 - 2 is cool too, since you can jump straight to level 5 there)

Well actually the most you can go is 4 I am pretty sure, am I right?

Level 1-2 because of the Warp Zone. I also like it because it's the way to the minus world.

Many people have never heard of the minus world. I think the first zone of the first level is the best level. Incredibly simple and so much fun.

Can you get into minus world using Super Mario All Stars?

I've tried and have yet to get into Minus World with All Stars which makes me believe that it isn't possible.

BTW, I found a Minus World Video if anyone is interested.