You have Sneaking and Smallguns...I give you a tip.
Near the back of Megaton is a "hollowed out rock"...someone left someone else a Sniperrifle and some ammo there. Have fun finding it.
Makes for some nasty sneak critical headshots if you can snipe.
I´m also a Small Guns player...I´m shit with energy weapons.
Well, I´m nearing level 30 and I have just completed the mainquest+Broken Steel addendum and started the Anchorage reclaimation simulation just today. I still have the Pitt and Point lookout aswell as Mothership Zeta to attend to and I´ve not yet been to Canterbury commons...plus a shitload of other places I have not yet been. The game is HUGE.
Also, the higher the level, the more difficult are the monsters you face...
If you are around level 20 when you finish the last Broken Steel quest "Who dares wins.", you find a SHITTON of Feral Ghoul Reavers (fucking hard enemies, even moreso then a Deathclaw) in the Presidential Subways...you have backup by Sentry Bots, but the Reavers are Bitches.
At lower levels, you get some glowing ones<.<
Sure, when you regularely dispatch Supermutant Overlords they turn to be no threat anymore, but one with a Gatlinglaser almost killed me because he just did so much damage to me and got me cornered. I almost ran out of healing items. But when you run around the Wasteland and would NORMALY find some Molerats and Raiders, you now find Yao Guai and Deathclaws.
Where normal Feral Ghouls are stalking, you find now Glowing ones and Reavers...
If you move around the Subs in DC at a too high level, you get some nasty enemies.
But the higher the level, the better the stuff you carry around with, of course... I almost exclusively carry unique weapons that do more damage then the regular ones, but still can be repaired to full with the normal ones.
Only ununique weapons I use are the Fat Man, Missile launcher and Sniper Rifle. And I use them rarely because of my Xhulong Assaultrifle and Ol´Painless aswell as Eugene do plenty of Damage in most situations.