Marriage at the first place is a unison of two persons or two families ??Indian Marriages- Indian marriage is not just a marriage of the two individual but marriage of the two families. Marriages r means to carry forward the caste regimes and r used as instruments for continuation of the caste lineage. The entrenched caste hierarchy in the indian social context makes marriage an institution that is also responsible for preventing and propagating socio-religious values and behaviour.
So marrying in same caste is always a wise decision as the persons and their values(in terms of religoin) are almost same and it will be easy for both the parties to deal with eachother with a ease.
And 100% its one's own decision i m just putting my views.
Do both the families have to take common decisions always, share the same bed, sleep with each other, share their earnings, eat the same food...........????
Families shaadi karwa deti hain aur bechaare do panchii lad ke mar bhi ja hain kayi baar (I am aint saying always !) so the contention that it is a unison of two families is viable BUT to an extent .....
Insaan khud khush rahega tab hi gaam ki sochega ....
Waise bhi aajkal jyadatar sab akele hi rehte hain .... relatives ke paas roj roj ke jhagde suljhaane ka time nahi hota .....