Here is a neat "trick"...
If you plan to use Heavy Armor and Swords... Don't pick those as your MAIN SKILLS... You don't want to level when doing common things, like fighting.
Why?
Because the creatures level with you, Der...
If your main skill is archery, and you NEED to level up, go hunt deer and rats with arrows. If you get your Heavy Armor and Sword skill up naturally, without leveling... You will be a master at every level, without the burden of having super-leveled creatures that are always above you, because you just leveled due to swinging your sword, which is now at the lowest of its levels skill.
I know it sounds backwards, but you need to pick main skills which are things you are NOT going to be good at, which you will find, that you NEED more often than hack-n-slash, later on... Like magic, reincarnation, invisibility, speechcraft, light-armor, harvesting...
Case in point... You are now level 100, and can't harvest needed supplies... You go broke buying them, or waste days questing for them in drops from creatures.
Case in point... You are level 4 in the first gate, then 5, then 20... so are the creatures... Yet your swings don't seem to have any more damage, and now you don't know how to make that primo head-shot with a bow and arrow, because you leveled-up by sword and shield. If your archer skill was high, something you need for the first-hit, then your natural hack-and-slash which was high, but not leveling you, will work more when they get near.
Case in point... You are now surrounded by hundreds of magical creatures... Hope you have fire-resist, lightning-resist, fatigue-resist, unburden, health-potions and a lot more in your inventory... because you didn't keep magic as something that gave you massive mana, which would have protected you more with similar spells, without having to drink a billion potions... (Which would also leave you with no money, having to keep buying potions, since you probably are not making them too. Most best weapons can/will be found, not purchased. However, common poitions are not common-enough, and the best scrolls and potions are nothing compared to what the wave of your hand can do.)
In the end, it is an RPG, just not classic RPG, as you also need skill and strategy in playing, something all hack-n-slashes do not require. Like life... you have to "Feel like you are cheating to win", without actually cheating. That is the skill. Find an obstacle and bash it, without taking the obvious failing path over and over again. Try a new path, try a new method, walk away and come back when you have a clear mind, or just think backwards.
Heck, I was a master at causing creatures to commit suicide until it just wasn't fun anymore. Making them walk off ledges to get me, or causing them to walk into one another's fire-balls. Making them swim down and drown. Eventually, I learned how to fight too. Once I changed my main skills, and made it more logical to reality... Boosting my weakest attributes while keeping my naturally strongest skills to the fate of my actual skill, without helping them. (They are fine, why do they need boosting? Why do you need to be level 100, 200, 300? There is no reward for being old and powerless in 90% of your skills, and being a master at 10%... Average guys win more than specialists, in any field. Specialists just have the ability to charge more. No-one is paying you anyways, so strive to be average.)