Since it was very interessting to read all of your opinions on the themes here, i decided to publish my view, too. :)

0 Automation: I think this theme is not very kind to beginners, but can lead to very interessting entries. However, my guess is that there would be some number of idle-games.

+1 Break the cycle: Has great potential. Multiple options to work in this theme. You could go for it in the story, - or in the gameplay. Also, there is a potential to "mind-blow" :smile:

+1 Control the environment, not the player: This would make a good theme, in my opinion. There are many opportunitys even for beginners like me and I think many of those are relativly easy to create. But also, for the advanced LD-creator, there is some great stuff to do here, like playing around with physics. :)

+1 Each playthrough builds on the last: Like Break the cycle, this one can be great, too! You also can adopt the theme for Story or Gameplay. Or even toy around with the controlls or so.

-1 Everything grows: I can't really imagine some great entrys from this. Also, afaik there was already a similar theme. I would not have a problem, with rolling up an old topic, but I read about this in other posts and i guess they would be upset. (No - I did not vote because of this. I voted because of my first point to this theme. :))

-1 It only changes when you aren't looking: I think this would spawn many "Slender-Likes" or "SCP-Likes". There are some neat ideas behind it, but this is a kind of hard topic for beginners, anyways, i think.

-1 Sacrifices must be made: To make it simple: I don't know why, but I kinda don't like it. ~ Sorry.

0 Absorb your enemies: It is more like a 'meh' situation. This is some specific mechanic that we already saw many times in other games. I would be ok if it gets the theme, but I would not care as much.

0 Darkness is your friend: Expected genre: stealth. :smile: But there are some good ideas or opportunitys. No must, but would be ok.

+1 Don't trust the game: This is some funny theme :smile: I can imagine some fun stuff in this. But probably there will be many games like "Unfair Mario" or so. I would love to see some "consitent" games that do not exploit unfair situations like this.

-1 Magic, but at what cost?: This theme has some potential, but i think it is not quiet enough. Its kinda like Sacrifices. To do somth. you need to take a hit. Im sure someone can come up with a great idea for this, but it's to hard, i guess.

0 Making connections: Again, a topic that we saw already many times in other games. But sure, why not. I would not mind. :)

0 One item, many uses: Ok, this one is a bit different than the other "0"'s. I guess you can do much stuff here. But it just did not take my interesst as much as the other +1's I would not mind. :)

+1 Take one, leave one: Looking forward to this one. You can play around with mechanics or steal / give the player movesets or somth like this. This could be fun! :)

0 Two connected worlds: More like: 'Meh'. Can be done, some nice ideas. But not very mind-blowing or unconventional.

-1 Evolve: I think this one has some options, but overall will result in many simillar entries. Also, i think this could be very hard for beginners. :)