Hooiveld told Celtic's 'The Huddle' programme: "When I'm on the field, I'm not always as nice as I am outside the field.
"Outside the field, I'm a perfectly nice guy but on the field I can be a bit nasty - in a good way, I think, a fair way.
"I demand from myself the best possible, but even from the people around me that I work with."
Hooiveld helped AIK win the Swedish double in his only season with the club, who have fallen on hard times financially.
He revealed how former Parkhead defender Johan Mjallby, who started and ended his career at AIK, helped sell the idea of Celtic to him.
"It was really funny because two months ago we did a photoshoot together," Hooiveld explained.
"Last time AIK were champions was '98, when Mjallby was playing.
"They were comparing us with each other: same personality, almost same position and way of thinking about football.
"We met each other there and he was telling me about Celtic and his stories.
"I'd get excited but, of course, everything was so far away that I could only dream about going to a club like Celtic.
"Now you can see that sometimes dreams can come true."
Hooiveld's move sees him reunited with former Heerenveen team-mate Georgios Samaras.
He said: "We had some good times; we were champions there as well with the second team of Heerenveen.
"I had some titles to my name and I want some more."
Hooiveld ultimately failed to make the grade at his first club and was even rejected by Livingston after a trial there in 2005.
After a loan spell at Dutch second division side FC Zwolle, he moved to Austrian side Kapfenberger SV.
The following season, he joined Finnish club Inter Turku and earned him a move to AIK two years later.
Celtic must also consider whether to make a fresh bid for Preston defender Sean St Ledger after seeing an approach rejected by the Coca-Cola Championship club last week.
Hooiveld and St Ledger would fill the void left by Gary Caldwell's impending departure.
The Hoops have agreed a fee with Middlesbrough for the sale of Scotland defender Caldwell and midfielder Barry Robson.
Willo Flood and Chris Killen are also close to a reunion with former Celtic boss Gordon Strachan at the Riverside, with reports claiming all four players have now undergone medicals.
Celtic 1/6, Draw 6/1, Falkirk 14/1