I go with both and, surprisingly, totally ignore the sniping tree. Decepti0n already makes sniping incredibly powerful... and no skills from the Sniping tree really look to benefit me a whole lot.
I'm honestly tempted to go with a Kunai/partial Bloodshed built using 3 elemental snipers and an Explosive rocket launcher, lol. --- Playing: LBP2, MHP3rd HD, ME3, OoT 3D, KH3D, Darksiders II "See You Space Cowboy."
Following the suggestion of another gfaqs poster, I've been playing a Shotgun Zero. The left and right of the Sniping Tree, plus Bore, and I'll probably take the left part of Cunning. Although really the last 14 points could be anything.
Currently using Moxxi's Heartbreaker, Corrosive Teapot and a random sniper rifle at level 17. It's an absolute bloodbath in the best possible way.
My observations on the melee build are: - it starts off painfully weak and slow until you get to 25 and get Execute - after that it's quite powerful and you can finish the main game without problems - TVHM however is once again quite challenging with the melee build. You hit the melee damage bonus cap a lot quicker than you'd like (because in general you'll prioritize stronger upgrades, so by the time you're 40ish you'll have only the smaller boosts left)
Right now, I'm not even sure I'll be able to handle the endgame content with the melee build. Perhaps if I can get my hands on a leveled 50ish Law & Order. Or maybe replace Order with something like the Bee and put a skill point in Resurgence instead. But I'll probably need Rising Sh0t too for the tougher enemies that survive my stealth attacks. (1,8% dmg increase per level = 9% damage increase and it's stackable 5 times, which would amount to 45% dmg increase if the enemy survives after your fifth attack.)
In any case, I still have room for probing around so maybe it is as powerful in endgame as people have claimed. (My level is 43 by the way.) --- D3 DLC Cut-Ins & WF: http://sion4ever.livejournal.com/
So far, i think Cunning skill tree is the most rewarding, and is flexible. Damn good melee attacker, not nearly as strong as bloodlust build, but that shock damage off unforseen is friggin crazy. the Kunai's really help as well --- PSN: aaronisbla "walk softly and carry a HUGE Axe" ~ Me