Kotor games, i thought they would be overly complicated and just some other star wars game but it was a real surprise when i played it the first time.
X- btf, i thought hmm this looked interesting when i was in a game shop one day i bought it then and there and thought wow this is amazing when i got home and played it.
GTA games, i liked the first one gta 1 and 2 was ok when the first 3d one came along i thought hmm but when i played it i just couldnt stop. The story was amazing the driving was amazing and i loved stealing other cars in that one and the loads of missions and sub plot missions kept me interested with plenty of variety. I was happy when vice came along with bikes and choppers and stuff, SA was a bit weird at first cos of the rpg elements and the gangmembers recruiting stuff but i got into it a lot after the first few missions after the gang territory stuff and when multiplayer came along i played it heavily and was having lots of fun.
Flatout games, i thought they would be generic games but i soon found them to be really fun, nitro, insane speeds, damage model was incredible to the details and best of all run really well on my older hardware i had back then.
Worms armageddon. Never really played a worms game but have played lemmings and a tanks game similar to worms. But once i got playing and making my own maps for it i got really into it and play it heavily to this day with snowdog online. Its great for a quidk battle and its turn based which is really fun.
The longest journey. - Incredible point and click adventure game. I had played adv games before but this was in a league of its own, it was increadibly long and really varied with fully voiced characters and an amazing story. The sequal "dreamfall" changed too much and went 3d and had bad controls and not as good inventory puzzles and too much action in it which u can die which as most will tell u adv gamers dont like action sequences and hate games where u can die in them since there not that type of game. There story and character adventures.
Their is more games but these are some of the more important games to me. Which surprised me how good they were.