Ok, so here's a somewhat popluar love story that is right about what you're expecting. Happy I watched this one as well. A good romance, with some great humor, and an overall fun story.
Positives: It's always nice to stumble on a new way of telling the same old story. Lovely Complex is the epitome of doing a solid job of this. Tiny runt of a man meets giant amazon of a girl. The couple that by decree of the universe ought not exist. Right? Cue humor and rather capable love story.
The two main characters in Lovely Complex are fun. You'll enjoy watching both of them put on their comedy show and then as it turns into something deeper you'll likely enjoy that aspect as well. The side characters do a great job as a supporting cast, and though there are a few moments here and there you'll find that most of the episodes do a good job at avoiding filler type content.
I don't know if I stressed how much I really love the two main characters. From their voicework to the character art design they are just fantastic. I can pretty much turn on any episode and just seeing them makes me smile. That's proof of work well done.
Negatives: So my biggest gripe, and the reason I didn't rate Lovely Complex higher than I did is that the story takes a bit of a dive at the end. Without getting into spoilery territory I'll just note that somewhere around episode 18 things take a bit of a turn and I don't think it does the story any service. I had a bit of a deja vu type experience that reminded me of Death Note. Basically, I felt the story should have ended without the third act.
Other than this though, Lovely Complex was a fun ride. It's lighter than the other things I've been watching lately, but sometimes a light hearted romantic comedy is a great fit. Totally worth watching for any fans of those genres and for anyone looking for something fun to spend a little time with. This show made me smile a lot!
One last note. I love the original opening theme. It's one of those themes that is so anime, and really fits the feel of the show. I kind of hate the trend of changing themes in anime. Most of the time I find that I miss the original theme. There are, of course, exceptions...but those are exceptions.