Many different styles, materials and manufacturers can baffle the new and experienced diver when trying to chose a new suit.  I've dove many of the different types over my career. Each has its strong point and certain types are better for certain kinds of diving.  This is where I come from - I use my suits hard and expect them to hold up.

I personally dive a Viking Pro vulcanized rubber suit for pleasure diving. For me it's a combination of its toughness, managable weight, standard size fit and moderate flexibility. For work I use a Viking HD series suit for its durability. It is heavy and stiff, but stands up to abuse, can be easily repaired and rarely leaks.  I've used several different vulcanized rubber suits and the Viking rubber formulation doesn't tear like some and stands up to rubbing on sharp steel, concrete and barnacles. As with all vulcanized suits, emergency patching of holes can be done with duct tape.  Permanent ones are fixed with color coordinated tire patches (you can buy them from a Dollar Store in emergencies).  Gates/Hunter vulcanized suits are nearly as good though this applies only to the newer ones of the last 4-5 years. Not as good a rubber formulation before that. Avon and Aquala don't use a rubber suitable for working in. 

I always use one piece cotton woolley underwear with thin wool long johns. My Thinsulate set ended up looking like cotton candy in a too-hot commercial dryer, so I don't use that material anymore 

The Typhoon and other shell suits vary greatly in quality, their biggest drawback comfort-wise is the lack of any stretch to the material. The material is hard to patch once you've punctured it, at times it's an ordeal to even find the hole unlike the vulcanized suits.  The shell is more likely to be punctured as the woven exterior catches sharp edges. Sharp folds in the suits are rub points and seem to rub through quicker than vulcanized suits .  My first drysuit was a cheap shell and the chest inflator cut a hole when I threw the suit -back down- in the back of my car! Oversizing these suits can help with the lack of stretch with the trade off of bigger air pockets.

The most comfortable suits are the crushed neoprene. Absolutely the most comfortable I've ever dove.  A big part of the flexiblity is from including extra fabric in the torso length.  It makes bending for fins, weight belts and just plain movement very easy.  Though hard to repair with boots wearing out after about one hard dive and a front entry zipper that can lead to frequent replacements, these are almost worth it from a comfort stand point. Very flexible and less fatiguing than any other.  If I didn't use my suit hard this is the material -with a shoulder entry- I'd use. Very difficult with leak locating and repairing, but if you use your suit lightly these are the best.

The standard neoprene drysuits are very good all round suits and do keep you warmer than others without needing as much underwear.  They also have a good amount of stretch.  The nylon covering abrades easily though and requires more time than vulcanized suits to dry between dives.  Not as durable as the vulcanized suits, they work well in areas where the water isn't too deep(neoprene crushes with increasing memory) or the obstacles too sharp. Of course Aquaseal is a great cure for what ails a neoprene suit and I've used my share.

I've actually glued on neoprene boots with hard soles (like Xtratuffs) to my drysuits to help with one of the biggest problems all of these suits have- thin soles. If you're not ready to modify, try felt sole inserts -they help (just remember to remove and dry them out!).  Without them you're going to feel every little pebble with the added weight of gear on your back.  Boots that slip over your drysuit boots can protect but tend to trap things under the sole that cause just as much pain as walking on them in the first place.