A list of all the mods I came up with and turned into a thing, none of them will prevent you from playing the game as normal or interfere with the basic gameplaycycle....except the rules mod, that one is "it will interfere as much as you want it to". Ordered by my own preference (My favs first my least favs on the bottom).
Preference details:
1- Da Rules: This was the most fun I've ever had coding anything, it gave all my "I dont want to make a mod, I just want to ♥♥♥♥ around" hours a meaning and something to move towards to. It did get more popular than what I anticipated, however, which made maintaining it a little annoying at times, but it's still the most fun I had modding Isaac despite that.
2.1- CAR: on release, it was a rushed mod that I made in around a week for April Fools. I knew it was going to be popular, since its a meme mod with actual effort behind it, but the reception was so much better than expected that I decided to longterm support it and eventually add a tainted and all.
2.2- Eknoh: This was a fun character to make, it was so freaking fun that i couldnt let go...kept adding sht until it turned into the clusferfckuk its today.
3- Agnis: Was originally made to fill the complete lack of hard characters on the workshop at the time, proly went a lil overboard, im aware, but it's the way I like it...a lil outdated now tho, need to give it a 2nd pass sometime.
4- Gurzil: This one got out of my hands, I love the character, it was really fun to make, but it spawned so much unexpected negativity on certain parts of the community that it burnt me out of it, it really made me view the "making mods" process in a completely different way (not in the good way). The character that many love to hate is how I would define it.
5(tie)- Super Gravitron: Really fun to make, I was VERY lazy with the code for this one (even more) tho, it's 80% reused Eknoh's code, as I never really intended to publish it but it works!.
5(tie)- Endless Room: My first "moderate-big" mod, it was completely eclipsed by the arena mod which released a mere 2 hours earlier, lol. From thsi point onwards, I decided I'll put my "style" in all of my mods so they dont end up "outclassed" like this one.
6(tie)- Smash Announcer: This one was something I always wanted. Rushed it in an afternoon due to a self-imposed challenge (to not take too much time away from da rules mod dev).
7- Completition marks: It wasnt particulary fun to make but it cool seeing how much people appreciated it (didnt expect that much attention from this one).
8- Flames of the unknown: I love blue flames so...why not fill the game with them?
9- Makes you Larger/smaller: This was more of a "Tutorial: the mod" for me, I just did this one to learn lua and get a glimpse of how the API worked. Also, the first mod for any game I ever released to the public.