I like the whole idea of remembering where the traps are like for example trying to complete the havoc level 1 but we all know there is a hidden trap but do you know what bit you have to build at. I liked that whole aspect, the whole trial and error and exploring where about the trap is.
I tend to think a lot different to people, if the level is good it is good regardless of whether it has a hidden trap, Havoc level 1 is a great example and a very enjoyable level I find. Sometimes if a route looks too easy think twice because it might have a hidden trap. Only thing I would encourage others to do is variety.
I remember fish the killer's levels which were actually probably not bad levels, mind you they didn't look the nicest but there's nothing wrong with having a bit of fun when making levels. They did give me a bit of a laugh when playing them. fun old days.
I love a good hero level, where one lemming does most of the work, those actually can be quite fun levels. I don't think we should put restrictions on what a level should be like or shouldn't be like. Every idea can be great if it is done well, yes a builderfest level as well, I know a lot will disagree. You could make a pack that just has builders only in it. Variety is the spice of life, if you do the same type of levels again and again, it could be off putting.
The old game rick dangerous which is a great game, you had to remember where all the traps where, a lot of trial and error, the same with tomb raider. I remember I got a huge fright in Lemmings paintball when I stepped on one of those green dots which I didn't see at first.
All type of levels are welcome in a grams88 world (lol)