I absolutely love Boku no kokoro yabai yatsu. Currently this has to be my favorite romcom. It starts weird but it gets so sweet by the end of season 1 you're going to get diabetes.
Another great show I can recommend is Golden Time. It's like Toradora but with older cast. I have to admit I enjoyed it way more than Toradora. Maybe because it was exactly my type of humor or because some situations were very realistic. Whole show is not like typical rom-com. It feels like it could happen for real.