A lot of games seem to be a matter of personal preference, which is why it’s so great that COG gives you the first few chapters for free.
Personally, Zombie Exodus has to be my all time favourite, it’s really long, has great immersion, characters are easy to relate to (optional romance with some of them too) and it has amazing re-playability. Perhaps not the most game changing choices, but strong enough to make you actively feel like it matters.
Following my obvious favouritism to the author, I recently played A Wise Use of Time, which was also good, although shorter and definitely a lot less re playability.
Other notable mentions for me are Choice of Robots, Choice of Broadsides, Choice of Dragon, (Choice of Rockstar was average but I’ll put it on here anyway), Choice of Romance was decent considering the low price of the additional chapters but it felt very limited and the seemingly unavoidable need to reaffirm my sexuality throughout it was tedious.
Life of a Wizard didn’t appeal to me because the style of writing didn’t seem to draw me in, but other people claim to love it.
Sabres of Infinity and Tin Star get a lot of praise and are probably worth checking out too.
Neighbourhood Necromancer looked appealing too although I’ve only played the free chapters so far.