Marrying within the same caste is fun to begin with. The problem is each of the couple knows the secrets used in the caste over hundreds of years: styles of bhoj, festivals and problems are well understood ahead of time. So kind of very boring down the line. Marrying outside the caste is very problematic to begin with: difficult to understand the other caste's tradition. Once you become an expert in the others' secrets, it is fun to play the game from there on. Marrying someone from a different country is usually fun to begin with. You start with not having to think about your parents' intention and that of your parents-in-law. Once the stage passes when you feel that your sex hormones are fully satisfied to nostalgia and all of a sudden the hereditary hermones kick in, you will start missing your relatives and start wondering why. If I've to give a suggestion please go for what your conscience tells you to. But if your conscience is lagging behind your heart, go over my descriptions above. Scientifically inter-racial marriage gives chances to unique genes' combinations. For Nepalese inter-caste marriage is a good choice both in terms of similarities and variations. If your marriage fails let me know. It will provide me database to anlyze in leisure. As they say, "Marry in haste and repent in leisure".