It really depends on your experience, comfort and what you shoot better with. I have no problems with the AR platform and have almost three decades of trigger time with it. It's not perfect and has limitations, but works well within those parameters and is a good bang-for-the-buck with plenty of spare parts and availability. I can say the same thing about AKs, although it does depend on make (some are crap); however, my Arsenal AK is almost as accurate as my ARs. If you like .308 caliber, there are a number quality platforms. I was lucky to jump on the FAL bandwagon a while back and I love how it handles. Yet, I really prefer my M1A for hunting of all my semi-auto rifles. Bullpups have their place, but I would caution against them unless you're really willing to commit to learning how to handle it; it's just different. Still they are very capable firearms and have some unique advantages with relation to size while maintaining longer barrels.
All have their advantages and disadvantages and most disadvantages can be mitigated through training. Just about all semi-auto (military-based) rifles on the market are "combat accurate" and will work for 90% of what most people would need or even maximize their skill level. Just about all reputable makers (and importers) provide robust and reliable firearms; you can get a lemon or two over time, but it's rare for the reputable ones.
I could go on, but for what I would choose would be inadequate for another depending on their own requirements based on their location/terrain, skill-level, experience, handling preferences, etc. I can recommend getting your hands on as many as possible to shoot and find what you're most comfortable with. Once you choose, invest time and training to maximize whatever advantages it has and train around the limitations. Know your rifle inside and out; know how to replace common-wear parts and make sure you have some on-hand. Don't discount optics as they are a game-changer in many situations and quality magnified optics extend precision at longer distances. I recommend simplicity first but some accessories can be beneficial if tempered with need.
ROCK6