I'm going to steal crystalscm's list idea. Hope you don't mind. cx
Between the Lines - Very cute GxB set in a fantasy world. I was so surprised when I played this about how much I cared for all of the characters! The art's sketchy style takes some getting used to and the story's a little rushed but there's something so pure about the characters.
Diving in Deep - Another GxB! Set in modern times and there's a merman. Some of the bad endings are a little dark, and the epilogues can feel a little rushed, but overall a decent read with some really cute moments. ^_^ Lots of CGs in this one, too!
her tears were my light - This one's GxG and it is actually the cutest freaking game I've ever played. Go play it. Right now. Read the rest of the list first, I mean. But then play it. (The art style combined with the fluffy story just makes it eeeeeeeeee)
Mira's Magical Mishap - This one is also GxG. The overall tone of the whole thing is super lighthearted and there are definitely some 'awww' moments throughout.
Nachtigal - We're back to GxB with this one! Nachtigal is a little different from the other ones in this list. It's vampire romance and soft horror, and I'm going to warn you now, the bad endings live up to their name. They're dark, sad, and depressing. The GOOD ends, on the other hand, are just. oh my gosh they are so cute aaaaaah. If you're willing to risk seeing a dark bad end if you fail, this one's definitely worth a download for those good ends. (The art is PHENOMENAL, by the way, and complements the writing really well. <3 I love Cyanide Tea's stuff so much.)
Prince Caterpillar - This one will be the only BxB on the list. And it's. So. Cute. Go play it. Uhhh, I guess play her tears were my light first because that's what I said. But also this one. It's really fluffy and great.
RE: Prince of Nigeria - Back to GxB. This one is really more comedy/parody than anything else, but it's short, cute, and hilarious, so I would definitely recommend it.
RE: Alistair++ - Another GxB, and this one is also a slice-of-life with an anime art style. ^_^ This one is also a stat-raiser, but if you're not great with those there is a walkthrough available online that can easily be found with a quick search. The protagonist is an online gamer searching for the player who cheated her online, so it's got some really funny moments and also some really cute ones.
Tears of Glass - So much GxB! cx This one is the only unfinished one on the list, but I would definitely say that it's worth a play. It's set in a high school and is very lighthearted and sweet. The guys are all very likable in their own way and have a good mixture of more cliche elements plus something all their own. The interactions between the characters are great, and a lot of the dialogue is very clever.
The Phantom of the Hospital - This one is the only one with love interests of multiple genders - GxG/B. Despite the spooky name, it's really a very lighthearted VN. As the creators phrased it, the game contains "mature jokes said in immature ways." Both routes are great and the characters are an interesting bunch.
Hopefully I've given you a lot of material that you're interested in! ^_^ If you play any of these, I would really like it if you would send me a PM telling me what you thought. I love to talk about my favorite VNs with other people, even if others don't like them as much as I did.