Translation:I love clocks.
Who doesnt love a nice big clock, or even multiple clocks at the same time.
Clocks are great, aren't they? I don't know why this answer made me laugh so much.
Technically 腕時計 is wristwatch. You couldn't use it for a pocket watch, for instance. Which is why I think duo should accept both here.
You are right. It basically refers to a generic timekeeping device, which includes clocks and watches. However, Duo has introduced us to both the generic word for a timekeeping device, and the specific word for such a device on the wrist.
Should "I love the clock" also be correct? Or is that more accurately written as "とけいを大好きです。"?
People would probably say このとけい in that case. You won't see を used with 好き because in Japanese like isn't a verb. Really 好き is an adjective, so you're actually describing the noun as likeable to you.
No, I think "この" specifically means "this". "The" was accepted in my answer "I really like the clock."
I put "I like the clock very much". As I understand it, "love" is AISURU. Or is that not used of inanimate objects?
好き（すき）can also be used to mean love. In fact it's more common for Japanese couples to say to each other 好き／大好き （だいすき）instead of 愛している（あいしている）. At least as far as I know. Also yea like NicoleClai2 said, 愛する has a romantic connotation to it. So unless you want to make love to clocks you probably shouldn't use this one. :P
Wouldn't say it's romantic. More intimate/very close than anything else. Can be romantic as well. Consider the following: 愛する兄弟よ... (my beloved brother,...)
時計 とけい can mean both watches and clocks. Precisely とけい is a clock but when you say とけいが大好きです, the listener takes it as (a watch) unless you are serious collector of clocks.
No, Japanese doesn't differ between "the" and "a". My answer of "I really like the clock." was accepted.
It matters if you give a correct answer which the programme marks as wrong!
I thought that 時計（とけい）is watch too? I love watches should be accepted as well.
Perhaps your assumption comes from "うで とけい" meaning wrist watch, and so you think you can drop ude and it still means watch, but no, the ude is not optional, the whole thing means watch.
These examples are starting to get ridiculous, but in a good way! haha, I like it!