Very balanced rosters... Delhi has the most airplanes followed by Calcutta & Bangalore (8 each) then Madras with about four Bombay with three and Pune, Hyderabad and Jaipur with two each and one airplane doing a night halt at Ahmedabad.
Delhi and Bombay have the international sectors... Don't hope on doing very many of those.
Delhi:
Many day returns like DEL GAU IMF GAU DEL, DEL RPR HYD BLR DEL, DEL IXJ SXR DEL, DEL SXR DEL, DEL BBI DEL, DEL BOM DEL, DEL MAA DEL, DEL KTM DEL
layovers are fairly decent patterns.
Bombay:
Layovers. Mostly. BOM BLR HYD CCU.... Calcutta will be your second home. Which is fantastic...
Bangalore:
BLR COK BLR, BLR DEL BLR other than that lot of Bombay and Delhi layovers.
Chennai:
Balanced.... MAA CCU GAU CCU MAA, MAA DEL MAA,
layovers... MAA BOM DEL, Same way back... CCU layover.
Calcutta:
Balanced. CCU BOM CCU, CCU DEL CCU, CCU GAU CCU, CCU MAA BLR CCU
And some BOM, MAA, CJB and DEL layovers
Hope it helps....